Apply a cool compress to the affected skin for 10–15 minutes at a time
Take an over-the-counter antihistamine such as cetirizine, loratadine, or fexofenadine
Avoid hot showers, heat, and sweating
Wear loose, soft clothing
Stop using any new soaps, lotions, detergents, or cosmetics
Avoid known triggers such as certain foods, alcohol, or pets
Do not scratch the hives
Use a gentle, fragrance-free moisturizer if the skin feels irritated
Take a lukewarm bath with colloidal oatmeal
Rest and stay hydrated
Seek urgent medical help if you have trouble breathing, swelling of the lips or tongue, or dizziness