Poison oak
Poison Oak
Poison oak (Toxicodendron diversilobum), pronounced /ˈpɔɪzən oʊk/, is a type of plant that is known for causing skin irritation and rash when touched. The name "poison oak" is derived from the plant's resemblance to oak leaves and its toxic effects.
Description
Poison oak is a deciduous shrub that can grow up to 3 meters tall. It is native to North America, particularly in the western regions. The leaves of the poison oak are similar to those of an oak tree, hence its name. They are usually grouped in threes on the stem and turn a bright red color in the fall.
Effects
Contact with poison oak can cause a severe allergic reaction known as urushiol-induced contact dermatitis. This is due to a compound called urushiol found in the plant's sap. Symptoms include itching, redness, swelling, and blisters. The reaction can occur within hours of exposure and can last for several weeks.
Treatment
Treatment for poison oak exposure involves washing the affected area with soap and water to remove the urushiol. Over-the-counter creams and medications can help to relieve the symptoms. In severe cases, a doctor may prescribe steroids to reduce inflammation.
Prevention
Prevention is the best way to avoid poison oak. This includes learning to identify the plant and avoiding areas where it grows. Wearing long sleeves and pants can also help to protect the skin.
Related Terms
External links
- Medical encyclopedia article on Poison oak
- Wikipedia's article - Poison oak
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