Poison ivy, poison oak, and poison sumac are plants that can cause a skin rash, Summer is prime time for the infections, according to University of Louisville Assistant Professor of Dermatology Courtney R. Schadt, MD . The red, uncomfortable, and itchy rash often shows up in lines or streaks and is marked by blisters and hives.
Dr. Schadt explains that the rash is caused by contact with an oil found in poison ivy, oak, or sumac. Indirect contact with urushiol can also cause the rash. This may happen when you touch clothing, shoes or other objects that have come in contact with one of these plants. But the oil does not cause a reaction in all people.
The usual symptoms of the rash are: Itchy skin, red streaks or general redness where the plant brushed against the skin, Small bumps or larger hives, and blisters. The rash usually appears 8 to 48 hours after your contact with the urushiol. But it can occur from 5 hours to 15 days after touching the plant. The rash is not contagious. You cannot catch or spread a rash after it appears.
There is only one medicine is approved to prevent it: Ivy Block. But there are many treatments for symptoms of poison ivy including calamine lotion and other sprays.
It is also difficult to distinguish bug bites and tick bites from some poison ivy rashes.
Here is the best way to reach Courtney R. Schadt, MD:
Associates in Dermatology
University of Louisville
Division of Dermatology
310 E. Broadway Suite 200
Louisville, KY 40202
502-583-1749
www.associatesindermatology.com
