urticaria
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Key facts
- Medical condition (new).name
- Hives
- Medical condition (new).synonyms
- Urticaria
- Medical condition (new).image
- EMminor2010.JPG
- Medical condition (new).caption
- Hives on the arm
- Medical condition (new).field
- Dermatology, clinical immunology, allergology
- Medical condition (new).symptoms
- Red, raised, itchy bumps
- Medical condition (new).duration
- A few days
- Medical condition (new).causes
- Stress, following an infection, result of an allergic reaction
- Medical condition (new).risks
- Hay fever, asthma
- Medical condition (new).diagnosis
- Based on symptoms, patch testing
- Medical condition (new).treatment
- Antihistamines, corticosteroids, leukotriene inhibitors
- Medical condition (new).frequency
- ~20%
via Wikipedia infobox
Article
35 sectionsContents
- Signs and symptoms
- Cause
- Medications
- Food
- Infection or environmental agent
- Dermatographic urticaria
- Pressure or delayed pressure
- Cholinergic or stress
- Cold-induced
- Solar urticaria
- Water-induced
- Exercise
- Pathophysiology
- Allergic hives
- Autoimmune hives
- Infections
- Nonallergic hives
- Dietary histamine poisoning
- Stress and chronic idiopathic hives
- Diagnosis
- Acute versus chronic
- Related conditions
- Angioedema
- Vibratory angioedema
- Management
- Systemic steroids
- Leukotriene-receptor antagonists
- Other
- Prognosis
- Epidemiology
- Research
- History
- See also
- References
- External links
Hives, also known as urticaria, is a kind of skin rash with red or flesh-colored, raised, itchy bumps. Hives may burn or sting. The patches of rash may appear on different body parts, with variable duration from minutes to days, and typically do not leave any long-lasting skin change. Fewer than 5% of cases last for more than six weeks (a condition known as chronic urticaria). The condition frequently recurs.
Hives frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food. Psychological stress, cold temperature, or vibration may also be a trigger. In half of cases the cause remains unknown. Risk factors include having conditions such as hay fever or asthma. Diagnosis is typically based on appearance. Patch testing may be useful to determine the allergy.