A rash that covers most of your body can be due to a variety of causes including: 1. Infection 2. Drug allergy 3. Allergy to contact exposure such as detergent, poison ivy, soap 4. Hives due to a variety of causes 5. Bug bites - e.g.Scabies the palms and soles may be spared due to the thickness of the skin in these areas. A rash may be present under the skin that is not visible in these regions.
43 year experience in Allergy and Immunology
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