A poison ivy rash typically lasts 1 to 3 weeks, with itching peaking in the first days - and it is not contagious: blister fluid contains no urushiol oil and cannot spread the rash.
New patches are usually slower-reacting skin, not spreading. The real spreader is leftover oil on clothes, shoes, tools, pet fur, and under fingernails - wash all of it. Treatment: cool showers, cold compresses, calamine, oral antihistamines for itch; severe, facial, or genital cases may need prescription steroids. See a doctor for face or genital involvement, large areas, fever, or any breathing trouble - burning poison ivy smoke is dangerous inhaled. Pymander is a free AI doctor, 24/7 by text, and can help you manage the itch.
What to do
Common questions
How long does poison ivy last?
A poison ivy rash typically lasts one to three weeks - mild cases settle in about a week, severe ones can take three, and the itching usually peaks in the first few days. The rash is caused by urushiol, the plant's oil, and two myths need killing. One: the rash is NOT contagious - blister fluid contains no urushiol and cannot spread it to others or new body areas. New patches appearing days later are usually slower-reacting skin, not spreading. Two: leftover oil is the real spreader - it lingers on clothes, shoes, tools, pet fur, and under fingernails, so wash everything that might have touched the plant within the first hours. Treatment: cool showers, calamine lotion, cold compresses, and oral antihistamines for itch; severe or facial cases may need prescription steroids. See a doctor for rash on the face or genitals, over large areas, with fever, or any trouble breathing (burning poison ivy smoke is dangerous to inhale). Pymander is a free AI doctor, 24/7 by text, that can help you manage the itch while it runs its course.