skin bumps caused by sun
Medical Conditions. Two different conditions can cause red bumps on your skin after sun exposure. Bumps related to polymorphous light eruption may appear when you first go out in the sun after winter or expose a body part to sun when it hasn't had exposure in some time.rotecting your skin from sunlight may help prevent outbreaks of red skin bumps and related symptoms, and medications can help you manage outbreaks that do occur. If your skin bumps result in open sores or severe itching that disrupts your daily activities, consult a health care provider.