Poison Ivy (Poison Oak, Poison Sumac)
Description
A common cause of a skin irritation called contact dermatitis or pruritic dermatitus, caused by contact with the urushiol resin the plant contains that often 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 skin.
Tests
A history and physical exam will be performed.
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. Topical Calamine lotion can help with the itching. 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.
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