Why Are Hives a Symptom of Allergies?
When your body's exposed to an allergy trigger, it releases a molecule called histamine. Histamine makes your blood vessels get bigger. And when this happens in your skin, it can actually cause swelling, or what we call a hive.
How Long Do Hives Last From an Allergic Reaction?
Depending on the allergy trigger, your hive can last an hour, it can last a day or even multiple days.
What Are the Best Treatments for Hives?
The best over-the-counter treatments for hives are things like antihistamines, like Claritin, Zyrtec, and Benadryl. But if you have severe hives, you should work with an allergist to try to figure out the best way to make them go away for good.