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Poison Ivy, Oak or Sumac

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Poison Ivy Rash on Forearm

Poison Ivy Plant

Poison Ivy Plant - Fall

Localized red rash with small blisters following poison ivy, oak or sumac exposure.
Rash is very itchy.
Located on exposed body surfaces (such as the hands) or areas touched by the hands (e.g., the face or genitals).

General Information

Poison ivy, poison sumac, and poison oak are three plants that can cause an itchy red rash in sensitive individuals. The oil contained in the plant leaves irritates the skin. The redness and blistering from the rash is often arranged in streaks or lines, because the leaves brush across the body in a line as an individual walks past.
Onset: Following a first-time exposure, the onset time for the rash is 1 to 2 weeks. For recurrences, the onset is 8 to 48 hours after the individual was in a forest or field.

Preventing the Rash

Wash skin: If you are exposed, remove the irritating plant oil from your skin as soon as possible. Wash the exposed part of your body with soap and water within 30 minutes. Wash your clothes in warm soapy water.
Over-the-counter protectants: When used prior to exposure, these products protect against the irritating oil of poison ivy, oak and sumac, preventing the painful rash from occurring. Several over-the-counter options exist to help protect against poison ivy/oak/sumac. Some product examples: Oral Ivy, IvyX, and IvyBlock.
Cover up: Wear protective clothing when in areas where you could be exposed to these plants.
Avoid exposure: Avoid exposure to these plants, especially if you have had a bad reaction in the past, and learn to recognize these plants.