Urticaria (noun)

An itchy rash on the skin, sometimes called hives, that is caused by an allergic reaction.

Origin:

Early 18th century; earliest use found in john wallis. from latin urticaria, from urtica nettle.

Examples:

1. She developed urticaria after eating shellfish, which she was allergic to.
2. The urticaria spread rapidly across his skin after he was stung by a bee.
3. The urticaria was treated with antihistamines to relieve the itching and swelling.
4. The urticaria disappeared within a few hours after taking the medication.
5. He had a history of urticaria, which was triggered by stress and anxiety.