Like poison ivy and poison sumac, poison oak releases an oil ... You may be able to reduce symptoms of poison oak rash with several treatments. These include over-the-counter (OTC) and ...

Poison sumac is less common but more toxic ... Treating the Rash: If a rash develops, over-the-counter treatments like calamine lotion, hydrocortisone cream, and antihistamines can help alleviate ...

Poison ivy, poison oak, and sumac grow in wooded and marshy ... to seek medical attention straight away if their rash does not improve with treatment or they develop a fever.

and poison sumac are three of the most common causes of allergic contact dermatitis in the U.S. They all contain an oil called urushiol, which triggers an allergic reaction, usually an itchy rash.

Medically reviewed by Susan Bard, MD An itchy rash with blisters can be caused by an allergic reaction; an autoimmune ...