urticaria

/ˌɜrtɪˈkɛriə/
noun
  1. A medical condition in which red, itchy welts appear on the skin, often caused by an allergic reaction; also called hives.
    • The doctor prescribed an antihistamine to treat his urticaria.
    • Stress can sometimes trigger an outbreak of urticaria.
    • She developed urticaria after eating shellfish for the first time.
Synonyms