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Poison Oak, Ivy and Sumac

Restoring skin health one patient at a time

The “Gang of Three”: Identifying Poison Ivy, Oak, and Sumac:

North America is home to three common plants that produce urushiol, an oily resin that causes an itchy, blistering rash called allergic contact dermatitis. While “Leaves of three, let it be” is a helpful rule of thumb, it does not apply to all three.

Poison Ivy: Always grows in three leaflets; it can appear as a ground vine, a shrub, or a thick, “hairy” climbing vine.

Poison Oak: Usually has three leaflets that resemble oak leaves, though it can occasionally have five or seven.

Poison Sumac: Found in wet, swampy areas, this plant has 7 to 13 leaflets per stem—never three.

Symptoms and Timing:

Symptoms typically appear 12 to 72 hours after contact and include:

Intense itching and inflammation.

Raised red streaks or patches.

Fluid-filled blisters (scratching the blisters does not spread the rash, but may cause infection).

Treatment and Prevention:

Immediate Washing: Thoroughly scrub exposed skin with soap and water or a specialized urushiol cleanser immediately after contact to remove the oil.

Symptom Relief: Over-the-counter hydrocortisone cream, calamine lotion, or oral antihistamines may be used to manage itching.

Cool Compresses: Applying cool baths or compresses may help to reduce swelling.

Professional Care: Seek medical attention for severe reactions, widespread rashes, or if the rash affects your face or genitals.

As always, Restoration Dermatology can help you manage your skincare issues. Call today for an appointment.