How do you know when you have poison ivy ?

Poison Ivy: The most common symptoms of the rash (allergic contact dermatitis ) from poison ivy, oak, or sumac are: itching. Red streaks or general redness where the plant brushed against the skin. Small bumps or larger raised areas (hives). Blisters filled with fluid that may leak out. In rare cases, some people develop blood-filled blisters that can turn black and become shiny dark spots.

Best guess: The diagnosis of poison ivy is typically speculative based on the appearance of the rash as well as an exposure. If you were outdoors and within 2 days develop an itchy rash, you may have poison ivy. The rash can start out as a red patch and eventually develop blisters. It typically breaks out on exposed areas that came in contact with the leaves.

Blistery ,itchy rash: Blistering itchy rash after getting exposed to poison ivy , oak, , .