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.