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Rash is not a specific diagnosis. Instead, it refers to any sort of inflammation and/or discoloration that distorts the skin's normal appearance. Common rashes include eczema, poison ivy, hives, and athlete's foot.
Infections that cause rashes may be fungal, bacterial, parasitic, or viral.
Over-the-counter products may be helpful treatments for many skin rashes.
Rashes lasting more than a few days, that worsen or that are unexplained should be evaluated by a doctor.