November 20, 2008

Font Size
A
A
A

Allergy: Poison Ivy, Oak, and Sumac (cont.)

Causes of Poison Ivy, Oak, and Sumac Rash

The rash caused by poison ivy, oak, and sumac is an allergic skin reaction to an oil, called urushiol, which is in the plant. This oil is found in all parts of the plant, including the leaves, stems, roots, and berries.

  • Exposure to the oil occurs through any of the following:
  • Touching any part of the plants
  • Touching clothing or other objects that have contacted the plants
  • Touching pets or other animals that have contacted the plants
  • Exposure to the smoke of burning plants
  • For more information about how these reactions occur, see Allergic Reactions and Contact Dermatitis.



Next: Symptoms of Poison Ivy, Oak, and Sumac Rash »

Printer-Friendly Format  |  Email to a Friend

Allergies & Asthma

Improve treatments & prevent attacks.

eMedicineHealth is a first aid and consumer health information site written by physicians for patients and consumers.
WebMD Symptom Checker - Start Here

Living with Sinusitis Living with Sinusitis
Millions of Americans suffer with sinusitis. While there are many treatments, it isn't always easy to find the right one for you. See more WebMD Videos »

Adult Skin Problems Slideshow

Search Medical Dictionary