What should you know about exercise urticaria?

Urticaria is the medical term for hives: raised, itchy areas caused by release of inflammatory chemicals in the skin. Exercise can raise body temperature and trigger sweating, producing fine bumps or larger connected welts on the trunk, neck, arms, or legs.

Some episodes are limited to the skin. Others involve deeper swelling, chest tightness, wheezing, stomach symptoms, or light-headedness. Foods, pain medicines, infection, heat, or pressure may change the threshold for an episode, so a detailed history helps separate patterns.

Stop the activity at the first sign of hives, cool down safely, and record what happened before and during the episode. Avoid exercising alone until the pattern has been assessed if symptoms have ever progressed beyond the skin.

A clinician may suggest an oral antihistamine, trigger planning, and a gradual return to activity. Do not borrow medication or change its timing without advice, because the correct plan depends on your history and other medicines.

Get emergency help for difficulty breathing, wheezing, throat tightness, voice change, faintness, confusion, repeated vomiting, or sudden swelling of the face, lips, or tongue. Stop exercising and follow any personal emergency plan while help is arranged.

Book a review for recurring welts, swelling that returns after exertion, or a rash that does not behave like brief hives. Bring photographs and a list of foods, medicines, heat exposure, and activity intensity.

Ask whether this is exercise-related urticaria or another reaction, whether angioedema is present, what medication plan to use, and what conditions must be met before resuming sport.