7 Signs of Cold Urticaria and When Cold Exposure Becomes Dangerous

Cold urticaria is a skin condition in which exposure to cold temperatures can trigger itchy welts, swelling, redness, or a burning sensation. The reaction may happen after contact with cold air, cold water, ice, chilled objects, or cold foods and drinks. For some people, symptoms stay limited to the exposed skin, but for others, cold exposure can lead to a more widespread reaction. This is why cold urticaria is more than a simple cold-weather rash.

Recognizing the signs of cold urticaria can help people avoid dangerous situations, especially swimming in cold water or being exposed to sudden temperature drops. Symptoms may appear within minutes and may worsen as the skin warms again. In severe cases, cold urticaria can cause swelling of the lips or throat, dizziness, fainting, trouble breathing, or anaphylaxis. This article explains seven signs of cold urticaria and when cold exposure may become dangerous.

Defining Cold Urticaria as a Physical Hypersensitivity

Cold urticaria is a distinct form of physical hives where exposure to dropping temperatures causes the rapid development of itchy welts, localized redness, and skin swelling. This condition is not a traditional allergy driven by IgE antibodies fighting off a foreign allergen like pollen or peanuts. Instead, it represents a profound physical hypersensitivity reaction to a thermal stimulus.

The exact temperature threshold required to spark this reaction varies significantly from person to person. While some individuals only develop symptoms when exposed to near-freezing environments, highly sensitive individuals can experience flare-ups during mild autumn breezes or inside air-conditioned rooms.

To evaluate this condition, clinicians frequently utilize a localized cold stimulation test. This diagnostic method involves placing a sealed ice cube or a controlled cold element against the patient’s forearm for several minutes. If the patient has the condition, a distinct, raised hive will form precisely where the cold item touched the skin as the tissue begins to rewarm.

Environmental Triggers and Exposure Dynamics

A sudden drop in skin temperature serves as the direct physical catalyst for a reaction, meaning that the speed of the temperature change often matters more than the absolute cold level itself. For individuals living with cold urticaria, a wide array of everyday scenarios can trigger sudden hives and swelling.

Environmental exposure is the most common culprit, such as walking out of a heated building into a chilly wind or browsing the refrigerated aisle of a grocery store. Because the face and hands are routinely exposed to the elements, these areas typically show the earliest signs of swelling.

Direct contact with chilled physical items presents another immediate trigger. Handling frozen food bags, holding a condensation-covered glass of iced water, or touching cold outdoor metal railings can cause hives to erupt across the palms and fingers.

The ingestion of chilled substances poses an even greater risk. Consuming ice cream, drinking iced beverages, or swallowing frozen desserts can cause localized swelling of the lips, tongue, and throat tissues, which can dangerously restrict the airway.

High-Risk Exposure Warning: Full-body immersion in unheated water—such as diving into an unheated swimming pool, a lake, or the ocean—stands as the most dangerous trigger for individuals with this hypersensitivity. Rapidly cooling a large surface area of the body can cause a massive, systemic release of chemical mediators into the bloodstream. This sudden flood can trigger anaphylaxis, causing a dangerous drop in blood pressure, shock, and a complete loss of consciousness while swimming.

Cellular Mechanisms: Mast Cell Degranulation and Histamine Release

The visible symptoms of cold urticaria are driven by a specific cellular cascade within the dermis layer of the skin. Specialized immune cells known as mast cells act as environmental sentinels throughout the skin and mucous membranes.

In individuals with this condition, these mast cells feature abnormally unstable membranes that are highly sensitive to sudden drops in temperature. While the exact trigger is still being studied, researchers believe the cold physically alters cell membrane fluidity or activates unique cold-sensitive proteins, prompting the mast cells to fire.

Once triggered by the cold, these mast cells undergo an explosive cellular process known as degranulation. During degranulation, the cells open their internal storage compartments and flood the surrounding tissue with powerful inflammatory chemicals. The primary chemical released is histamine, though it is accompanied by other inflammatory compounds including prostaglandins, leukotrienes, and signaling cytokines.

As histamine enters the local tissue, it immediately binds to receptors on nearby blood vessels, causing the tiny capillaries to widen significantly. This sudden widening increases local blood flow, creating the characteristic redness or flare reaction.

At the same time, histamine makes the capillary walls porous and leaky, allowing blood plasma to seep out of the vessels and pool into the surrounding skin layers. When this fluid pools in the upper layers of the skin, it forms the raised, itchy welts known as hives.

If the fluid leaks into the deeper subcutaneous tissue layers, it produces a thicker, more painful swelling called angioedema. Finally, the released histamine directly irritates the sensory nerve endings in the skin, sending constant itch signals to the brain.

7 Warning Signs of Cold Urticaria

The 7 warning signs of cold urticaria range from common localized skin reactions like hives, redness, itching, and swelling to severe systemic symptoms including dangerous swelling of the lips and throat, lightheadedness or fainting, and life-threatening anaphylaxis.

These signs typically appear within two to five minutes of exposure to a cold stimulus and can vary dramatically in intensity depending on the individual’s sensitivity and the extent of the cold exposure. Recognizing the full spectrum of these signs is critical, as what begins as a mild skin reaction can, under certain circumstances, escalate into a full-blown medical emergency. The symptoms generally resolve within one to two hours after the skin has been warmed.

These signs can be broadly categorized into localized cutaneous (skin) reactions, which are most common, and more dangerous systemic responses that affect the entire body.

Localized Skin Manifestations

The earliest and most common warning signs of cold urticaria are localized skin reactions that appear within two to five minutes of exposure to a cold stimulus. These primary symptoms occur directly on the areas of the skin exposed to the thermal drop and are driven by the sudden release of histamine in those specific tissues. While these localized skin changes are generally not life-threatening on their own, they cause significant discomfort and serve as the initial warning sign of this physical hypersensitivity.

Hives and Welts (Wheals)

The most defining skin symptom is the rapid eruption of hives or wheals. These raised, swollen bumps are typically pale or white in the center with a distinct red border and clearly defined edges. They can vary in size from tiny, isolated dots to large, overlapping plaques that cover a substantial area of skin. These welts form precisely where the skin was chilled, creating a clear physical outline of the cold contact zone.

Redness (Erythema)

Accompanying the hives is a widespread area of skin redness known as a flare reaction. This vivid redness is caused by the sudden widening of superficial blood vessels in the dermis as histamine floods the tissue. This vascular expansion makes the affected skin feel warm to the touch and appear flushed, blotchy, and heavily inflamed.

Intense Itching (Pruritus)

The hives caused by cold exposure are almost always accompanied by intense, burning pruritus. This sensory symptom occurs because histamine binds tightly to H1 receptors on the fine sensory nerve endings in the skin, sending constant, urgent itch signals to the brain. The resulting itch can be severe and distressing, often provoking scratching that can damage the skin barrier.

Deep Tissue Swelling (Angioedema)

When fluid leaks into the deeper subcutaneous tissue layers rather than the surface dermis, it causes a more diffuse, poorly defined swelling known as angioedema. Unlike surface hives, angioedema can feel heavy, tight, and tender rather than purely itchy. It most commonly strikes areas with loose connective tissue, such as the hands, feet, or eyelids. For instance, an individual’s entire hand may swell and stiffen after holding a cold steering wheel or carrying frozen grocery bags.

Severe Systemic and Life-Threatening Reactions

Systemic warning signs indicate a severe medical emergency where the reaction spreads beyond a localized patch of skin to affect the entire body. These critical symptoms occur when a massive, coordinated wave of histamine and other inflammatory mediators enters the general bloodstream. This widespread reaction is typically triggered by whole-body cooling, such as swimming in unheated water, or by consuming freezing substances, requiring immediate emergency medical intervention.

         [Progressive Escalation of Systemic Symptoms]
                              │
     ┌────────────────────────┼────────────────────────┐
     ▼                        ▼                        ▼
[Airway Obstruction]    [Vascular Collapse]      [Anaphylactic Shock]
 ├── Tongue swelling     ├── Widespread flushing  ├── Multi-organ failure
 ├── Throat tightness    ├── Severe hypotension   ├── Severe bronchospasm
 └── Airway blockage     └── Syncopal fainting    └── Cardiovascular arrest

Swelling of the Lips and Throat

Consuming very cold foods or beverages can trigger rapid, localized angioedema within the oral cavity. Swelling of the lips, tongue, or pharynx can quickly close off the airway, leading to immediate difficulty breathing, speaking, or swallowing. Experiencing a sensation of throat tightness, wheezing, or a sudden change in voice quality after consuming iced drinks is a dangerous red flag that can rapidly progress to complete airway blockage and asphyxiation.

Lightheadedness and Fainting (Syncope)

When large areas of the skin are suddenly chilled, a massive systemic release of histamine causes widespread widening of blood vessels throughout the body. This sudden expansion leads to a severe drop in blood pressure, known as hypotension. As blood flow and oxygen to the brain drop, the individual will experience sudden dizziness, confusion, a racing heart rate as the body tries to compensate, and syncope (fainting). Fainting is exceptionally dangerous if it occurs while swimming, as it can lead to immediate drowning.

Anaphylaxis

This represents the most extreme and life-threatening danger of cold urticaria. Anaphylaxis is a rapid, whole-body allergic reaction that disrupts multiple organ systems at the same time. The clinical signs include widespread hives and severe swelling combined with dangerous respiratory distress, such as wheezing and shortness of breath from closing bronchial tubes, alongside sudden cardiovascular collapse.

Other symptoms can include sharp abdominal cramps, vomiting, and a profound psychological sense of impending doom. Anaphylaxis from cold exposure is a critical medical emergency that requires an immediate injection of intramuscular epinephrine and urgent transportation to an emergency medical facility.

Symptom Progression and Clinical Threat Levels

Understanding how these symptoms develop provides a clear picture of how a physical reaction can change from a mild skin irritation to a critical health crisis.

In mild cases, the reaction stays limited to the skin surface. Raised wheals and redness represent a low clinical threat level, meaning they cause severe physical discomfort and itching but pose no direct danger to vital organs. Similarly, subcutaneous angioedema in the hands or feet remains at a low to moderate threat level, briefly causing tightness and reducing grip strength without affecting the rest of the body.

The danger escalates drastically when symptoms shift from the skin to internal systems. Oropharyngeal swelling from cold intake represents a high clinical threat level because the physical swelling of oral tissues can quickly block the airway.

Systemic hypotension and syncope also carry a high threat level; the sudden widening of blood vessels lowers blood pressure, starves the brain of oxygen, and creates a severe risk of injury from falls or drowning during water immersion.

At the most dangerous end of the spectrum is systemic anaphylaxis. This whole-body immune failure strikes the respiratory and cardiovascular systems simultaneously, creating a critical, life-threatening emergency that requires immediate intervention with an epinephrine auto-injector.

The Threshold of Systemic Danger

The primary danger of cold urticaria lies in its dose-dependent relationship with the body’s surface area. While chilling a small patch of skin—such as holding a cold soda can—typically results in a harmless, localized welt, exposing a large surface area to a cold stimulus can cause a rapid shift from a minor skin issue to a life-threatening systemic crisis.

This dangerous escalation happens when the volume of cold exposure crosses a critical physical threshold. Instead of triggering a few isolated mast cells, full-body cooling causes a massive, coordinated degranulation of mast cells across multiple tissue layers at the same time.

This simultaneous breakdown floods the general circulation with an overwhelming amount of histamine and other inflammatory chemicals. The sudden presence of these compounds in the bloodstream can quickly overwhelm the cardiovascular and respiratory systems, causing severe medical emergencies before the patient can actively warm their skin.

Cold-Induced Anaphylaxis and Physiological Collapse

Anaphylaxis is a rapid, severe, and potentially fatal systemic reaction that disrupts multiple organ systems. While most people associate anaphylaxis with classic biological allergens like peanut proteins, shellfish, or bee venom, individuals with cold urticaria experience this exact same physiological collapse triggered entirely by a physical drop in temperature.

[Mass Full-Body Cold Exposure] ──► Global Mast Cell Degranulation ──► Massive Histamine Blood Flood
                                                                               │
                 ┌─────────────────────────────────────────────────────────────┤
                 ▼                                                             ▼
   [Widespread Vasodilation]                                     [Severe Bronchospasm]
   ├── Precipitous Blood Pressure Drop                           ├── Airway Constriction & Wheezing
   └── Cardiovascular Shock & Fainting                           └── Rapid Respiratory Failure

Severe Cardiovascular Collapse

When a massive wave of histamine enters the bloodstream, it causes widespread vasodilation, forcing the smooth muscles lining the body’s blood vessels to relax and widen all at once. This sudden vascular expansion causes a sharp drop in blood pressure, known as hypotension, leading to a state of cardiovascular shock.

The heart rate increases rapidly—a compensatory condition called tachycardia—as the body desperately tries to pump blood to vital organs. If the blood pressure drops too low, the brain is starved of oxygen, causing the patient to lose consciousness.

Acute Respiratory Distress

At the same time the cardiovascular system is failing, the respiratory tract faces a dual threat. Histamine and chemical leukotrienes cause severe bronchospasm, physically squeezing the airways inside the lungs and causing heavy wheezing and shortness of breath.

Simultaneously, deep-tissue angioedema strikes the larynx and pharynx, causing the throat tissues to swell rapidly. This swelling can completely block the upper airway, leading to physical asphyxiation and respiratory arrest if left untreated.

The Immediate Risk of Drowning

For individuals with this temperature hypersensitivity, the risk of fainting from low blood pressure carries an additional danger if it happens while swimming. If a patient plunges into cold water and suffers a systemic reaction, the resulting fainting spell can cause them to drown immediately, long before the internal respiratory or cardiovascular effects of anaphylaxis can become fatal on their own.

High-Risk Activities and Situational Exposure

Evaluating the relative danger of various everyday activities helps establish clear boundaries for patient safety. The risk level of any cold exposure is directly determined by the total area of skin exposed, the temperature of the stimulus, and how quickly the skin temperature drops.

Open Water and Immersive Activities

Plunging into unheated open water—such as swimming, diving, surfing, or waterskiing in lakes, pools, or the ocean—is unequivocally the most dangerous activity for anyone with this condition. Water conducts heat away from the skin roughly 25 times faster than air, causing a rapid thermal drop across the entire body. Even water that feels mildly cool or refreshing to others can easily cross the dangerous systemic threshold for a sensitive individual, triggering full-body degranulation within minutes.

Unprotected Severe Weather Exposure

Being outdoors in freezing, windy winter weather without specialized protective clothing poses a significant systemic risk. The physical combination of low temperatures and wind chill accelerates heat loss from exposed skin on the face, neck, and hands. If an individual is caught unprepared in these conditions for an extended period, the widespread chilling of their skin can easily trigger a whole-body reaction.

Risks in Medical and Surgical Settings

Operating rooms are kept notoriously cold to control bacteria and preserve equipment, and surgical teams routinely administer chilled intravenous (IV) fluids to patients. For a patient with undiagnosed cold urticaria, lying exposed on a cold operating table while receiving cool fluids can trigger systemic hypotension or anaphylaxis. Because these symptoms occur while the patient is under general anesthesia, it can be incredibly difficult for the medical team to distinguish the reaction from standard surgical shock, complicating emergency care.

Elective Cryotherapy Exposure

Modern elective treatments, such as whole-body cryotherapy chambers used for sports recovery or fat-reduction treatments, expose the skin to extreme sub-zero temperatures. These cold-based therapies are exceptionally dangerous for anyone with this condition and must be strictly avoided, as they can cause immediate, catastrophic mast cell activation across the entire body.

How is Cold Urticaria Diagnosed, Managed, and Differentiated?

Doctors diagnose cold urticaria using specific provocation tests like the ice cube challenge, manage it through trigger avoidance and antihistamines, and differentiate it from other cold-related conditions like Raynaud’s phenomenon by its distinct histamine-driven hive formation. Furthermore, understanding the nuances of diagnosis and management is crucial for patient safety and quality of life, as the condition ranges from a mild nuisance to a life-threatening risk.

A thorough evaluation helps distinguish between the common idiopathic form and rarer secondary types linked to underlying diseases, guiding the long-term treatment strategy. This comprehensive approach ensures that patients receive not only immediate relief from symptoms but also a clear plan to prevent severe reactions and address any associated health issues.

Clinical Diagnosis and the Ice Cube Challenge Test

Diagnosing cold urticaria relies on specific physical provocation tests designed to replicate thermal hypersensitivity in a controlled clinical environment. The primary diagnostic method is the ice cube challenge test.

Executing the Provocation Test

To perform this test, a clinician places an ice cube, usually sealed in a thin plastic bag to prevent direct moisture or a freeze burn, onto the skin of the patient’s forearm. The ice remains in place for exactly five minutes before it is removed and the area is gently blotted dry.

The definitive diagnostic window occurs during the rewarming phase over the next 10 to 15 minutes. A positive test result is confirmed when a distinct, raised, red, and intensely itchy welt (a wheal) forms precisely where the cold stimulus was applied.

Factors Affecting Diagnostic Accuracy

Graded Temperature Testing: While the standard ice cube test is highly effective, results can be altered by ambient room humidity, core body temperature, or the thickness of the patient’s skin. To achieve quantifiable data, specialists often use advanced devices like the TempTest®. This instrument applies a range of specific temperatures to the forearm, mapping out the precise degree at which mast cells begin to fire.

Managing False Negatives: A negative ice cube test does not completely rule out the condition. Some individuals present with atypical variants where hives are triggered only by a rapid wind-chill factor or prolonged exposure to cold air, rather than direct contact with ice. In these scenarios, a meticulous patient history detailing real-world environmental flare-ups is paramount.

Predicting Systemic Vulnerability: While a localized wheal confirms that mast cells are abnormally sensitive to temperature drops, it cannot accurately predict how severely an individual’s entire body will react to full-body cooling. Therefore, a positive skin test must always be paired with a comprehensive medical history evaluating systemic red flags, such as dizziness or throat tightness.

Etiological Classification: Primary vs. Secondary Typologies

When a patient tests positive for this thermal hypersensitivity, the medical team must classify the condition as either primary or secondary. This distinction alters the long-term management strategy and determines whether further medical testing is necessary.

                        [Cold Urticaria Classification]
                                       │
     ┌─────────────────────────────────┴─────────────────────────────────┐
     ▼                                                                   ▼
[Primary Idiopathic Form]                                   [Secondary Acquired Form]
 ├── Most common (children/young adults)                     ├── Linked to underlying pathology
 ├── No identifiable disease source                          ├── Triggered by proteins or infections
 └── Often resolves on its own in 5-10 years                 └── Requires treatment of the root cause

Primary Idiopathic Cold Urticaria

The primary form, also known as idiopathic cold urticaria, represents the vast majority of clinical cases. Its defining feature is the absolute absence of an underlying disease or systemic driver.

It typically appears out of nowhere in children and young adults. While its exact duration is unpredictable, the primary form is frequently self-limiting, often resolving completely on its own within five to ten years. Management focuses entirely on avoiding triggers and controlling local skin symptoms.

Secondary Acquired Cold Urticaria

Secondary cold urticaria is much rarer and develops as a direct symptom of an underlying medical condition. In these cases, treating the physical hives requires identifying and correcting the root systemic illness:

Active Systemic Infections: The sudden onset of temperature-induced hives can be triggered by active viral or bacterial infections. Common culprits include the Epstein-Barr virus (infectious mononucleosis), hepatitis panels, syphilis, and Mycoplasma pneumoniae. Once the underlying infection is cleared, the hives typically disappear.

Cryoglobulinemia Dynamics: This hematological condition involves the presence of abnormal blood proteins called cryoglobulins that clump together when exposed to cold temperatures. This clumping restricts blood flow and irritates tissues, causing skin hives, purpura rashes, joint pain, and muscle weakness. Cryoglobulinemia is frequently linked to chronic hepatitis C infections or autoimmune conditions.

Hematologic Malignancies: In rare instances, secondary hives serve as an early warning sign of blood-related cancers, such as chronic lymphocytic leukemia (CLL) or various forms of lymphoma, requiring a comprehensive medical workup.

Differential Diagnosis: Cold Urticaria vs. Raynaud’s Phenomenon

Because both conditions are directly triggered by cold exposure, cold urticaria is frequently confused with Raynaud’s phenomenon. However, they stem from completely separate bodily systems and present distinct physical symptoms.

Core Mechanisms and Systems

The condition known as cold urticaria is an immunological disorder driven by mast cells releasing histamine into the skin tissue. Raynaud’s phenomenon is a vascular disorder characterized by an overactive vasospastic response in the tiny arteries supplying the body’s extremities. It is an isolated circulation problem, completely free of any histamine or allergic pathways.

Visual Manifestations and Locations

The hallmark of this temperature hypersensitivity is the rapid eruption of itchy, raised welts and localized swelling that can appear on any patch of skin exposed to the cold. Raynaud’s phenomenon presents with a sequence of color changes in the fingers and toes, turning white due to sudden vasospasms, then deep blue from a lack of oxygenated blood, and finally bright red as circulation returns.

Raynaud’s is almost exclusively confined to the fingers, toes, earlobes, and nose tip, and it never produces hives or skin wheals.

Multi-Tiered Prevention and Pharmacotherapy Options

Effectively managing this hypersensitivity requires a structured approach that combines proactive prevention with targeted medical therapies to handle accidental exposures.

[Layered Weather Protection] ──► [High-Dose H1 Antihistamines] ──► [Omalizumab / EpiPen Preparedness]

Lifestyle Prevention and Environmental Shielding

The foundation of care relies on avoiding triggers. Patients must modify their daily habits to prevent rapid skin cooling. This includes wearing layered insulating clothing, windproof jackets, scarves, and gloves during cold weather.

Individuals must avoid jumping into unheated open water, pools, or lakes due to the high risk of full-body anaphylaxis. Chilled foods, frozen desserts, and iced drinks must also be consumed with extreme caution to prevent dangerous tongue or throat swelling.

First-Line Medical Therapies

When environmental exposure is unavoidable, first-line medical treatment relies on high-dose, non-sedating, second-generation H1 antihistamines. Standard daily medications include cetirizine, fexofenadine, and loratadine.

To successfully block the H1 receptors on blood vessels and nerves, allergists frequently prescribe doses up to four times the standard over-the-counter amount. This high baseline dose helps prevent the swelling cascade before cold exposure occurs.

Advanced Medical Options and Emergency Preparedness

For individuals with a documented history of severe systemic reactions or fainting, carrying an epinephrine auto-injector is an absolute necessity. Patients and their immediate circles must be thoroughly trained to inject epinephrine at the first sign of throat tightness, wheezing, or dizziness.

For chronic, severe cases that do not respond to maximum doses of , specialists use advanced biologic therapies. Omalizumab, a monoclonal antibody that targets and binds to IgE receptors, has shown excellent clinical success in stabilizing mast cells and preventing severe cold-induced reactions.

Conclusion

Cold urticaria can range from mild itchy hives to a serious whole-body reaction. Warning signs include raised welts, swelling, redness, burning, lip or throat swelling, dizziness, fainting, and breathing trouble after cold exposure. Full-body cold exposure, such as swimming in cold water, can be especially risky because it may trigger a sudden and severe reaction. If symptoms are severe, spreading quickly, or involve breathing problems, throat swelling, weakness, or fainting, emergency medical care is needed right away.

Read more: 10 Causes of Tendinopathy and How Tendons Become Damaged

Frequently Asked Questions

1. What is cold urticaria?

Cold urticaria is a condition that causes hives or swelling after exposure to cold temperatures. It can be triggered by cold air, cold water, ice, cold objects, or chilled foods and drinks. The reaction usually appears on skin that was exposed to the cold. In some cases, it can affect the whole body and become dangerous.

2. What are the common signs of cold urticaria?

Common signs of cold urticaria include itchy welts, redness, swelling, burning, or tenderness after cold exposure. The rash may appear within minutes and can become more noticeable as the skin warms. Some people may also develop swelling of the hands after holding cold objects. Cold drinks or frozen foods may cause lip, tongue, or throat swelling in more serious cases.

3. When can cold urticaria become dangerous?

Cold urticaria can become dangerous when the reaction spreads beyond a small area of skin. Warning signs include dizziness, fainting, fast heartbeat, trouble breathing, throat swelling, or a sudden drop in blood pressure. Swimming in cold water is a major risk because large areas of skin are exposed at once. These symptoms may suggest anaphylaxis and need emergency care.

4. What triggers cold urticaria?

Cold urticaria can be triggered by cold weather, wind, swimming, cold showers, ice packs, air conditioning, or touching cold objects. Drinking cold beverages or eating frozen foods may also trigger symptoms around the mouth or throat. Some people react only to strong cold exposure, while others react to mild temperature changes. Identifying personal triggers can help reduce the risk of flare-ups.

5. How is cold urticaria treated?

Treatment usually focuses on avoiding cold triggers and preventing severe reactions. Doctors may recommend non-drowsy antihistamines to reduce hives and itching. People with a history of severe reactions may be advised to carry emergency epinephrine. A healthcare provider or allergist can help confirm the diagnosis and create a safety plan.

Sources

• Cold Urticaria: What It Is, Symptoms, Causes & Treatment (Cleveland Clinic)
• Cold Urticaria – Symptoms & Causes (Mayo Clinic)
• Cold Urticaria (DermNet)
• Cold Urticaria Prevalence, Treatments, and Risk of Anaphylaxis (AAAAI)
• Hives and Angioedema – Symptoms and Causes (Mayo Clinic)
• Urticaria: An Overview (DermNet)
• Cold-Induced Urticaria: Challenges in Diagnosis and Management (PMC)
• Cold Urticaria Syndromes: Diagnosis and Management (Journal of Allergy and Clinical Immunology: In Practice)