Urticaria

Definition

Urticaria, commonly known as hives, is a skin reaction characterized by itchy welts that can vary in size and appear anywhere on the body. It is often triggered by an allergic reaction or exposure to certain drugs.

5 Must Know Facts For Your Next Test

1. Urticaria is frequently associated with the release of histamine from mast cells in response to allergens.
2. Antihistamines are the primary treatment for managing urticaria symptoms.
3. Common triggers for urticaria include foods, medications, insect stings, and stress.
4. Decongestants may sometimes be used alongside antihistamines to relieve symptoms of urticaria.
5. Chronic urticaria lasts more than six weeks and may require different therapeutic approaches compared to acute urticaria.

Review Questions

• What are the common triggers for urticaria?
• How do antihistamines help in managing urticaria?
• Why might decongestants be used alongside antihistamines for treating urticaria?

Related terms

Antihistamine:

A drug that counteracts the effects of histamine and is commonly used to treat allergic reactions like urticaria.

Histamine:

A compound released by mast cells that causes inflammation and allergy symptoms, including those seen in urticaria.

Angioedema:

Swelling similar to urticaria but occurring beneath the skin, often affecting areas like eyelids, lips, and throat.