A common symptom of Lyme disease is a bullseye-shaped rash. However, many other conditions may cause a similar rash, including ringworm, fixed drug reactions, and allergic reactions to insect bites.

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a T-cell–mediated severe cutaneous adverse reaction characterized by rash, fever, internal organ involvement, and systemic ...

Drug rashes, or drug eruptions, are reactions your skin may develop in response to certain drugs. While any drug can cause a rash, certain types are more notorious for causing reactions. These include ...

Lichen planus is a skin rash triggered by the immune system. A variety of products and environmental agents can trigger this condition, but the exact cause isn’t always known. Sometimes this skin ...

Abbott Park, IL - New warnings have been added to the prescribing information for adalimumab (Humira, Abbott) about hypersensitivity reactions and hematologic events that have been reported during ...

About 20 million people in the U.S.—including four million children—have food allergies. Now, there's a new way to reduce their risk of severe allergic reactions. A study published in the New England ...