Overview

Dermatitis is the general name used for any rash or inflammation of the skin. Different kinds of dermatitis cause different kinds of rashes. Common causes of a rash include new medicines, plants (such as poison ivy or poison sumac), heat, and stress. Certain illnesses can also cause a rash.

An allergic reaction to something that touches your skin, such as latex, nickel, or poison ivy, is called contact dermatitis. Contact dermatitis may also be caused by something that irritates the skin, such as bleach, a chemical, or soap. These types of rashes cannot be spread from person to person.

How long your rash will last depends on what caused it. Rashes may last a few days or months.

How can you care for yourself at home?

• Do not scratch the rash. Cut your nails short, and file them smooth. Or wear gloves if this helps keep you from scratching.
• Wash the area with water only. Pat dry.
• Put cold, wet cloths on the rash to reduce itching.
• Keep cool, and stay out of the sun.
• Leave the rash open to the air as much as possible.
• If the rash itches, use hydrocortisone cream. Follow the directions on the label. Calamine lotion may help for plant rashes.
• If itching affects your sleep, ask your doctor if you can take an antihistamine that might reduce itching and make you sleepy, such as diphenhydramine (Benadryl). Be safe with medicines. Read and follow all instructions on the label.
• If your doctor prescribed a cream, use it as directed. If your doctor prescribed medicine, take it exactly as directed.