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Risk Factors and Causes

A personal or family history of allergies or asthma increases the risk for rashes. People who spend a lot of time outdoors are at increased risk for poison ivy, poison oak, and poison sumac; and for rashes caused by insect bites.

Common causes for rashes include the following:

Allergic reaction (e.g., resulting from an animal allergy, drug allergy, or food allergy) Bacterial infection (e.g., impetigo) Drug side effect Excessive skin rubbing (friction) Fungal inf...Read the full article