A poison oak rash appears where the contact with the oil occurred. However, it can also form on parts of the body not contacted by the plant. It normally starts as itching and mild irritation and gradually worsens developing in to a red rash that gradually gets more itchy. Bumps will form, which can turn into blisters.

Why does poison oak not itch?

Don't scratch the blisters. Bacteria from under your fingernails can get into them and cause an infection. The rash, blisters, and itch normally disappear in several weeks without any treatment.

How can you tell if its poison oak?

Symptoms of poison oak include itchy red rashes that can resemble burns, swelling, and even blistering. Symptoms can take 24-48 hours or even up to a week to show up, particularly if its your first exposure! Poison oak, like poison ivy, contains urushiol.