Aspirin Allergy - Hives

Hives (Urticaria) are skin reactions that cause red or white itchy welts, which vary in size and appear and fade repeatedly as the reaction runs its course. Chronic hives is a condition in which the welts last more than six weeks or recur over months or years. Chronic hives usually aren't life-threatening.

Aspirin is used to relieve the symptoms of arthritis, lupus, fever, mild to moderate pain and prevent heart attacks in people who have had a heart attack in the past. Sensitivity to aspirin can cause acute urticaria in some individuals, worsen pre-existing chronic urticaria in others or, rarely, act with food or exercise to provoke anaphylaxis (a severe hypersensitivity reaction). Individuals who react with urticaria appear to come from a different population to those who react with asthma, although there is some overlap. Aspirin-sensitive chronic urticaria patients may also react adversely to some food additives.

Related to:
HNMT, Histamine, Aspirin, acetylsalicylic acid, chronic urticaria, allergic inflammation