When do you go to a doctor for poison ivy?

You should see a doctor for poison ivy if you experience severe symptoms, such as intense itching, swelling, or widespread rash that covers a large area of your body. Additionally, if you develop blisters that become infected, or if you have difficulty breathing or swallowing, seek medical attention immediately. It's also advisable to consult a doctor if the rash does not improve after a week of home treatment.