Overview
The rash often appears in streaks or lines where the plant brushed the skin, 12 to 72 hours after contact.
The oil can stay on clothes, tools, and pets. Burning these plants can harm the lungs.
Symptoms
Common signs:
- Itchy rash in streaks or lines after being outdoors
- Itching
- Blisters
Less common
- Swelling
- Oozing
When to get medical care
Causes
An allergic reaction to urushiol oil.
Who is more likely to get it
- Outdoor work
- Hiking
- Pets that roam
Possible complications
- Cellulitis: From scratching
Diagnosis
A healthcare professional can tell by looking.
Questions you may be asked
- Outdoor activity
- Face or genital rash
The exam
A skin check.
Treatment
Wash off the oil fast and treat the itch.
Self-care
- Wash skin with soap and water: within 30 minutes if you can
- Wash clothes, tools, and pets
- Use cool compresses and oatmeal baths
- Don't scratch
Medicines
Medicines that may help:
| Medicine | Helps with | Good to know |
|---|---|---|
| Anti-itch creams | Itching | |
| Steroid pills or creams (prescription) | Severe or widespread rash | Need the full course. |
OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.
Prevention
To avoid it:
- Learn the plants: leaves of three
- Wear long sleeves and gloves
- Wash after outdoor work
Which doctor treats this
- Urgent care or the ER can treat it first. For minor problems, your primary care provider can help.
- They may send you to a dermatologist (skin doctor).
- Poison Control can help right away, any time: call 1-800-222-1222.
Back to school, work, or sports
- Recovery time varies. Ask your care team when you can drive, lift, work, and exercise.
Outlook
Clears in 1 to 3 weeks.
Myths and facts
Myth: The rash spreads from the blisters.
Fact: The rash only spreads from the plant oil. Blister fluid doesn't spread it.
Getting ready for your visit
Bring a list of your symptoms and medicines.
Questions to ask
- Do I need steroid pills?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Poison ivy, oak, or sumac rash
Sources
Last updated 2026-11-12.