?This Is What’s Causing Your Hives—And What To Do About Them

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The most frequent ones include allergic reactions to medications (especially the penicillin family of antibiotics, muscle relaxants, opiates, aspirin, and ibuprofen); foods, most often fish, tree nuts, shellfish, or just contact with certain raw fruits or raw seafood (even if you weren’t allergic to them before); insect bites, like bedbugs, mites, fleas, and bees; and latex (gloves or condoms).

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Less common causes include physical stimuli like heat, cold, and pressure applied to the skin, or increased body heat due to exercise, hot baths, or even strong emotions.

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If you think an allergy is to blame, your doctor can do allergy testing. Still have no idea? Don’t panic: Welts usually go away on their own within 24 hours, and to relieve the itch, you can apply cool compresses or take an over-the-counter antihistamine.

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If you haven’t found the trigger and your hives last for more than six weeks, see your doctor. It could still be a more benign cause, but she can look into other causes like celiac disease, hypothyroidism, and lupus.

This article originally appeared in the July/August 2017 issue of Women’s Health. For more great advice, pick up a copy of the issue on newsstands now!