Health Tip: What Causes Hives?
(HealthDay News) -- Hives are an allergic skin reaction caused by the body's release of histamine.
The American Academy of Allergy Asthma & Immunology mentions these common causes of hives:
Exposure to an allergic trigger.
Eating something that triggers an allergic reaction.
Exercising, or exposure to heat.
Being bitten by an insect.
Having an allergic reaction to a medication.