Getting a poison oak rash can happen to anyone. They develop on your skin when you get exposed to the poison oak, a plant that usually grows as vines, shrubs or bushes in mountainous areas.

The poison oak is the most common cause of allergic reactions in the United States, based on the web site of the University of Iowa (UI) Health Care.

What Exactly is a Poison Oak Rash?

Specifically, a poison oak rash is an allergic skin reaction to urushiol, the oil that is found in poison oak. The plant’s stems, …

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