why do i have a rash with bumps
Contact dermatitis is another possible explanation for your rash. This rash occurs when certain substances come into contact with your skin. Contact dermatitis causes a localized rash on the skin which may be red, sore, itchy, and have bumps or blisters. There are two kinds of contact dermatitis: irritant or allergic. Irritant contact dermatitis is more often painful than itchy, and is caused by a substance damaging the part of your skin where it comes into contact.