Contact dermatitis is inflammation of the outer layers of the skin caused by contact with a particular substance. It usually presents as a rash that is confined to the specific area of the body where the contact occurred.
Contact dermatitis is usually caused by either an irritant or an allergen. An irritant is a substance that irritates the skin. An allergen is a substance that causes an allergic reaction. People may be exposed to certain substances for years and never have a problem, and then suddenly develop contact dermatitis.
Some common causes of contact dermatitis include:
Factors that may increase your risk of contact dermatitis include:
The symptoms of contact dermatitis may vary from person to person. Scratching and rubbing can cause or worsen some symptoms. The rash is usually confined to the area where the contact with the substance occurred, but occasionally may spread. If contact with the substance occurred all over the body, such as with a body lotion, the rash may be large.
You will be asked about your symptoms and medical history. A physical exam will be done. You may be referred to a doctor who specializes in skin disorders (dermatologist) or allergies (allergist).
The primary goal of treatment is to identify the substance causing the reaction and remove or avoid it. This could take several days or weeks of avoiding certain substances.
If you cannot identify the cause of your skin reaction, you may need to have a skin patch test. In a skin patch test, a small amount of the suspected substance is applied to the skin and covered with tape. Another patch without the substance on it is also attached to the skin. Both patches are removed after a period of time. If your skin is red and swollen under the suspected substance patch, and not under the other patch, you are probably allergic to that substance.
Treatment also focuses on caring for skin and relieving symptoms. Methods include:
Skin care guidelines may include:
Do not use any of these medications until after you have discussed them with your doctor.
American Academy of Allergy, Asthma, and Immunology
American Academy of Dermatology
Canadian Dermatology Association
Bourke J, Coulson I, English J. Guidelines for care of contact dermatitis. Br J Dermatol. 2001;145:877-885.
11/6/2009 DynaMed's Systematic Literature Surveillance http://www.ebscohost.com/dynamed: Kütting B, Baumeister T, et al. Effectiveness of skin protection measures in prevention of occupational hand eczema: results of a prospective randomized controlled trial over a follow-up period of 1 year. Br J Dermatol. 2009 Sep 1. [Epub ahead of print]
2/24/2014 DynaMed's Systematic Literature Surveillance http://www.ebscohost.com/dynamed: Dawe R, Ferguson J. Diagnosis and treatment of chronic actinic dermatitis. Dermatol Ther. 2003;16(1):45-51.
Last reviewed August 2014 by Marcin Chwistek, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.