Another name for Welts is Urticaria.
What is urticaria?
A person with urticaria has mild redness and swelling of the skin. Common causes of urticaria include allergic reactions, stress, anxiety, and medication side effects. Urticaria usually resolves in 48 to 72 hours. About 1 out of every 1000 people in the US develop urticaria each year.
What are the symptoms of urticaria?
Symptoms of urticaria include a pink, itchy rash that looks like hives or welts. The rash may spread quickly.
How does the doctor treat urticaria?
Treatment for urticaria may include antihistamines, corticosteroids, and additional medications that treat allergic reactions. Treatment in those with allergies may also include allergy shots.
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- Muller BA. A comprehensive review of physical urticaria. Compr Ther. 2002 Winter;28(4):214-21. 
- Varadarajulu S. Urticaria and angioedema. Controlling acute episodes, coping with chronic cases. Postgrad Med. 2005 May;117(5):25-31.