A rash is defined as a change in the skin’s appearance, which may involve alternations in texture (e.g. rough or smooth) and/or its color. The skin may also become itchy, warmer, dry, cracked, blistered, lumpy or painful. Depending on where the rash is located, other symptoms you are experiencing, what you have been exposed to and any family history, there are many causes for a rash. Some people’s skin can be very sensitive to the sun in spring and summer. For them, exposure to sunlight results in a Sun rash.Sun rash is a minor problem which may cure by home treatment.