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As summer approaches and the landscape turns greener, so too are the leaves from poison ivy, poison oak and poison sumac. When the oil from these plants touches the skin, most people (about 85 percent) develop an itchy, blistering rash. Although the rash itself is not contagious, the oil can spread to other areas of the body and from person to person if not quickly washed off after touching the plants. Fortunately, there are simple steps people can take to safely treat the rash at home.
If you are absolutely certain that your rash is due to poison ivy, poison oak, or poison sumac, and if the rash appears on a small section of your skin, you may be able to treat the rash at home. However, if you have difficulty breathing or swallowing, you experience swelling, or you have many rashes or blisters, go to the emergency room right away.
If you are not experiencing a serious reaction, dermatologists recommend the following tips for treating the rash and easing the itch:
- Immediately rinse your skin with lukewarm, soapy water. If you can rinse your skin immediately after touching poison ivy, poison oak, or poison sumac, you may be able to rinse off some of the oil. This helps ensure that the oil does not spread to other areas of the body and cause additional rashes.
- Wash your clothing. Thoroughly wash all of the clothes you were wearing when you came into contact with the poisonous plant. The oil can stick to clothing, and if it touches your skin, it can cause another rash.
- Wash everything that may have the oil on its surface. Besides clothing, the oil from poison ivy, poison oak, and poison sumac can stick to many surfaces, including gardening tools, golf clubs, leashes and even a pet’s fur. Be sure to rinse your pet’s fur, and wash tools and other objects with warm, soapy water.
- Do not scratch, as scratching can cause an infection.
- Leave blisters alone. If blisters open, do not remove the overlying skin, as the skin can protect the raw wound underneath and prevent infection.
- Take short, lukewarm baths. To ease the itch, take short, lukewarm baths in a colloidal oatmeal preparation, which you can buy at your local drugstore. You can also draw a bath and add one cup of baking soda to the running water. Taking short, cool showers may also help.
- Consider calamine lotion or hydrocortisone cream. Apply calamine lotion to skin that itches. If you have a mild case, a hydrocortisone cream or lotion may also help.
- Apply cool compresses to the itchy skin. You can make a cool compress by wetting a clean washcloth with cold water and wringing it out so that it does not drip. Then, apply the cool cloth to the itchy skin.
- Consider taking antihistamine pills. These pills can help reduce itching, however use with caution. You should not apply a topical antihistamine to your skin, as doing so can worsen the rash and the itch.
A rash from poison ivy, oak or sumac usually lasts one to three weeks. If your rash is not improving after seven to 10 days, or you think your rash may be infected, see a board-certified dermatologist for treatment.