Toxicodendron or Rhus Dermatitis

Toxicodendron dermatitis, also called Allergic phytodermatitis or Rhus dermatitis is an allergic contact dermatitis that occurs from exposure to members of the plant genus Toxicodendron. In North America , this includes poison ivy, poison oak, and, much less frequently, poison sumac. Usually the skin is involved; however, the eyes, airway, and lungs may be involved if exposed to smoke from burning plants. In susceptible individuals, lesions generally appear within 12-24 hours, although they have been noted to arise earlier. New lesions may continue to appear for up to 2-3 weeks.