The rash may spread from scratching if you still have oil on your skin, so the line might not be straight. If you have a rash that’s spreading after you scratch it, then it’s likely poison ivy or one of its cousins, poison oak and poison sumac. However, keep in mind that other types of rashes can spread as well.

Wash clothes that came in contact with poison ivy immediately and separately. Handle them as little as possible. If your pets came into contact with poison ivy, wash them immediately. The irritating oil can remain on their fur and spread to things they touch. You should also wash anything you know they touched, as oil could remain on the surface. Pets usually won’t develop a rash after contacting poison ivy. You likely won’t notice your pet got into poison ivy unless you see them do it or develop a rash yourself after touching the contaminated fur. [3] X Research source

Blisters usually develop within 1 to 14 days after you encounter the poison ivy. [5] X Research source Never pop blisters on your own! With a poison ivy rash, you’ll likely see more swelling than with other types of rashes. Watch for pus coming from the blisters. If you notice pus, then your rash is likely infected and you should see a doctor for treatment as soon as possible.

It’s best to use a wash cloth to apply the soap over the affected area. However, the soap lather should protect your hands from exposure to the oil if you must use your hands to apply the soap. The water needs to be running in order to remove the oil. If you soak in water, the oil will mix with the water and affect more of your skin. Avoid using hot water, which opens your pores. It could cause your skin to absorb more of the oil.

Don’t rub the wipes on areas that didn’t contact the oil. You don’t want to accidentally spread it. After using 1 piece of gauze or cotton swab, throw it away.

Jewelweed helps by countering the oil contained in the poison ivy. It can help you avoid a rash or reduce the intensity of your symptoms. Only use paste you made from the jewelweed itself. Don’t rely on extracts and soaps made from jewelweed, which aren’t as effective. [8] X Trustworthy Source PubMed Central Journal archive from the U. S. National Institutes of Health Go to source You can apply more jewelweed paste if you desire. You can purchase jewelweed online if you cannot find the plant.

You should only use the cream for up to 3 days after your rash develops. Be sure to read the label and follow all of the instructions. Check with your doctor before using the product.

Follow all of the instructions on the label. It’s best to check with your doctor before applying any over-the-counter medications. Keep in mind that calamine lotion may stain clothing and sheets if it gets on them.

Check the label to see how often you should take your antihistamine. Diphenhydramine (Benadryl) is often taken every 4 hours, while others are taken just once a day. Keep in mind that some antihistamines cause drowsiness, and alcohol will intensify this effect. Check the label on your product to see if it causes drowsiness. If it does, avoid activities like driving or operating machinery.

You can usually find colloidal oatmeal in the bath section of your local department store. As another option, you can grind traditional rolled oats in a grinder or blender to create a bath blend. [16] X Research source However, purchasing colloidal oatmeal bath is a much easier option.

You can also soak your rag in an astringent liquid, such as chilled black tea or a 50/50 mixture of apple cider vinegar and water. Some people find more relief with these options. If using vinegar, test it on a small area of your skin first to see if you are sensitive to it. Wash the rag separately from other clothing.

You can reapply the baking soda a few times a day, if you desire.

If you’re buying just the gel, make sure the product you choose doesn’t have any added ingredients.

For example, a large area might mean your entire calf or forearm. You should always see a doctor if the rash is on your face or genitals.

Corticosteroids can cause side effects, so you should only use them as needed. The most common side effects with short-term use include sleeping issues, appetite changes, and mood issues. [22] X Trustworthy Source National Health Service (UK) Public healthcare system of the UK Go to source Follow all of your doctor’s directions for taking the medication.

Scratching increases your risk of developing an infection, since you can break the skin. Do not scratch your rash!