Now what? Generally, rashes from a sun allergy go away on their own within 10 days. You can try an over-the-counter anti-itch cream with hydrocortisone or an oral antihistamine to relieve some of ...

The sun's UV rays can make a butterfly rash on your face worse, so always wear sunscreen. (Photo Credit: Dr P. Marazzi/Science Source) It's possible to have lupus skin rashes all over your body.