VINCENT ZUBER, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY VINCENT ZUBER, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Ivy allergy. Arm of a woman with an inflamed rash caused by an allergic reaction to poison ivy (Toxicodendron radicans). There are numerous red, fluid-filled vesicles on the skin. The symptoms of an allergy are caused by the body's immune system mistaking harmless substances for disease-causing organisms. Poison ivy produces a sap which, if touched, the body's antibodies become sensitized to. The next time contact is made with this sap, the immune system releases histamines, resulting in inflammation. While it is best to avoid the ivy, antihistamine drugs and corticosteroid drugs will help to relieve the symptoms.
Model release not required. Property release not required.