By DrJewell
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Many people each year suffer from poison plant allergies and the symptoms from the plant poison can be very uncomfortable and aggravating, and in some cases, when a very sensitive person comes into contact with these poisonous plants they develop a severe allergic reaction within hours which would require immediate emergency medical care to prevent the condition from getting worse. The chemical substance or toxin found in most poisonous plants is the urushiol oil which causes the red rashes and the unbearable itchiness. The toxin is found in poison ivy, poison oak and poison sumac. Some individuals are initially immune to the poison, but over time if there is continual exposure to the poison the person will gradual develop sensitivity to it.