Dermatitis Health Channel

	Feature Article Illustrations for this article Click on an image below to enlarge Poison oak rash on the arm Dermatitis, nickel on the sole Show all 11 photos Contact dermatitis Definition Contact dermatitis is an inflammation of the skin caused by direct contact with an irritating substance. Alternative Names Dermatitis - contact; Allergic dermatitis; Dermatitis - allergic; Poison ivy; Poison oak; Poison sumac Causes, incidence, and risk factors Contact dermatitis is an inflammation of the skin caused by direct contact with an irritating or allergy-causing substance (irritant or allergen). Reactions may vary in the same person over time. A history of any type of allergies increases the risk for this condition. Irritant dermatitis, the most common type of contact dermatitis, involves inflammation resulting from contact with acids, alkaline materials such as soaps and detergents, solvents, or other chemicals. The reaction usually resembles a burn. Allergic contact dermatitis, the second most common type of contact dermatitis, is caused by exposure to a substance or material to which you have become extra sensitive or allergic. The allergic reaction is often delayed, with the rash appearing 24 - 48 hours after exposure. The skin inflammation varies from mild irritation and redness to open sores, depending on the type of irritant, the body part affected, and your sensitivity. Overtreatment dermatitis is a form of contact dermatitis that occurs when treatment for another skin disorder causes irritation. Common allergens associated with contact dermatitis include: Poison ivy, poison oak, poison sumac Other plants Nickel or other metals Medications Antibiotics, especially those applied to the surface of the skin (topical) Topical anesthetics Other medications Rubber or latex Cosmetics Fabrics and clothing Detergents Solvents Adhesives Fragrances, perfumes Other chemicals and substances Contact dermatitis may involve a reaction to a substance that you are exposed to, or use repeatedly. Although there may be no initial reaction, regular use (for example, nail polish remover, preservatives in contact lens solutions, or repeated contact with metals in earring posts and the metal backs of watches) can eventually cause cause sensitivity and reaction to the product. Some products cause a reaction only when they contact the skin and are exposed to sunlight (photosensitivity). These include shaving lotions, sunscreens, sulfa ointments, some perfumes, coal tar products, and oil from the skin of a lime. A few airborne allergens, such as ragweed or insecticide spray, can cause contact dermatitis. Continue reading this article

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Eczema (3 Videos, 13 Images) Average Rating: (Doctor-Reviewed information)
Eczema is a chronic skin disorder that involves scaly and itchy rashes.Reviewer: Michael Lehrer, MD, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.Date: 10/28/2008
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Diaper dermatitis - irritant-induced (2 Images) (Doctor-Reviewed information)
Irritant-induced diaper dermatitis is a diaper rash caused by chemical irritants instead of bacterial or yeast (candida) infection.Reviewer: Rachel A. Lewis, MD, FAAP, Columbia University Pediatric Faculty Practice, New York, NY. Review provided by VeriMed Healthcare Network.Date: 08/15/2007
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Diaper rash (2 Images) (Doctor-Reviewed information)
A diaper rash is a skin problem that develops in the area beneath an infant's diaper.Reviewer: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.Date: 08/02/2009
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Seborrheic dermatitis (1 Image) (Doctor-Reviewed information)
Seborrheic dermatitis is a common, inflammatory skin condition that causes flaky, white to yellowish scales to form on oily areas such as the scalp or inside the ear. It can occur with or without reddened skin. Cradle cap is the term used when seb...Reviewer: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network.Date: 07/18/2007
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Exfoliative dermatitis (1 Image) (Doctor-Reviewed information)
Exfoliative dermatitis is widespread scaling of the skin, often with itching (pruritus), skin redness (erythroderma), and hair loss. It may occur in severe cases of many common skin conditions, including eczema, psoriasis, and allergic reactions. ...Reviewer: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.Date: 02/05/2008
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Perioral dermatitis (1 Image) (Doctor-Reviewed information)
Perioral dermatitis is a skin disorder characterized by tiny red bumps (papules) around the mouth.Reviewer: Michael Lehrer, MD, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network; Linda Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.Date: 12/11/2009
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Dermatitis herpetiformis (6 Images) (Doctor-Reviewed information)
Dermatitis herpetiformis is an extremely itchy rash made of bumps and blisters. The rash is chronic, which means it continues over a long period of time.Reviewer: Jonathan Kantor, MD, North Florida Dermatology Associates, Jacksonville, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.Date: 04/15/2009
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