Poison oak is a plant with three leaflets that appear on a single stalk and grow in bushes. These plants, like poison ivy and sumac, contain an oil called urushiol, which causes an allergic reaction on the skin, creating an itchy, inflamed rash. Over-the-counter products like colloidal oatmeal, antihistamines and anti-itch creams or lotions may help ease the symptoms and calm the rash. A severe reaction, however, requires emergency treatment, which may result in prescription medication.
Colloidal Oatmeal
Colloidal oatmeal is not your breakfast cereal; it is a commonly used product for relieving itching associated with allergic skin reactions, such as poison oak. Individuals with eczema, psoriasis and skin discomfort caused by bug bites and chicken pox may also find relief with colloidal oatmeal. In commercial products, the oatmeal is ground into a fine powder. When added to bathwater, the powder dissolves, creating a murky appearance. The oatmeal bath coats the skin, moisturizes and soothes itch. It is safe to take several baths daily, depending on the severity of the rash.
Cool Baths/Compresses
Cool baths and compresses are simple ways to ease itching related to poison oak. Bathing in cool water will help calm inflammation of the skin and decrease the urgency to itch the bothersome poison oak rash. Applying cool compresses to particular areas of the body for 15 to 30 minutes several times daily may also relieve irritation.
Over-the-Counter Medications
Several over-the-counter treatment options exist for poison oak. High-potency corticosteroid creams like hydrocortisone may be helpful, particularly within the first few days following the outbreak, according to the Mayo Clinic. Other options include calamine lotion, oral medications like antihistamines (though these medications may cause drowsiness) and menthol-based creams, which may feel cool on the rash.
Prescription Medications
Severe poison oak rashes that are widespread or cause serious blistering may require the aid of prescription medications. Medications like prednisone, an oral corticosteroid, are recommended by doctors to help ease the symptoms associated with poison oak. Generally, the rash will go away within 1 to 3 weeks.
