Poison ivy (poison oak, poison sumac)

Description A common cause of a...

Description

A common cause of a skin irritation called contact dermatitis or pruritic dermatitis results from contact with the urushiol resin that poison ivy contains. This results in a red, itchy rash consisting of small bumps, blisters or swelling. Similar reactions occur after contact with poison oak and poison sumac.

Symptoms

Redness, itching, weeping, swelling, small bumps on the skin.

Tests

Common tests used for diagnosis and treatment

Workup:
A history and physical exam will be performed.

Specialists:
Internal Medicine, Dermatology, Pediatrics, Family Practice, Pediatric Dermatology, Telemedicine Dermatology

Treatment

Treatment includes: removal of the exposure and cleansing of the skin. The affected skin needs to be cleaned with soap and water as soon as possible since only 50% of the resin can be removed after 10 minutes have passed. Topical steroids either over the counter (1% hydrocortisone) or by prescription are administered for mild cases. Oral steroids such as prednisone (Deltasone) are used for more severe reactions. Over-the-counter topical anti-itch medications (such as Calamine lotion) can be helpful. An over the counter oral antihistamine such as diphenhydramine (Benadryl) can also reduce the itching. It is important to clean all clothes and shoes that came in contact with the plant as well to prevent re-exposure.