A poison ivy rash will last at least a week and likely more if you've never been exposed before. If you come into contact with poison ivy, the rash will typically appear within 12-48 hours.

Treating a poison ivy rash usually involves prescription-strength ... What it looks like: Purplish lesions on the inner arms, legs, wrists, or ankles can signify lichen planus, a skin rash ...

Poison oak rash is an allergic reaction to the leaves ... depending on the time of year. Like poison ivy and poison sumac, poison oak releases an oil called urushiol when it sustains damage.

Medically reviewed by Susan Bard, MD An itchy rash with blisters can be caused by an allergic reaction; an autoimmune disorder; a bacterial, fungal, or viral infection; and trauma to the skin.

Perform a patch test on the inside of your wrist or elbow before applying ... is an old household remedy for itchy skin, such as rashes, poison ivy, or bug bites. It has even been shown to be ...

If you come into contact with poison ivy, wash the area with soap and water as soon as possible. Soaking in an oatmeal bath and applying anti-itch creams can provide relief from an itchy rash.

When you’re spending time outdoors this summer, in your own yard or hiking in a park, it’s useful to know to spot poison ivy.