Possible Skin Conditions

On the page below, you will find examples of rashes that can affect the whole body in adults. Allergies are the cause of many widespread rashes. An allergy from a medication is called a drug eruption, and these reactions may range in severity from a subtle skin color change to blisters and welts that may result in loss of skin. You should consult your doctor if you experience a rash after starting a new medication. In fact, any large rash that appears suddenly should be evaluated by a physician as it may be the early sign of a severe allergic reaction. Occasionally a viral infection will cause a large rash on the body in adults, called a viral exanthem, which is most common in children but may occur in adults as well. Additionally, chronic skin conditions (eg, psoriasis) can cause a widespread rash.