What is contact dermatitis?

Contact dermatitis is an eczematous skin disease which is caused by direct contact with a noxious agent. Most contact dermatitis reactions are dose related. The severity of the reaction depends on how long, how much and how irritating a particular substance is.

Contact dermatitis is categorized into tow categories...irritant and allergic dermatitis. Irritant contact dermatitis, is more common and occurs immediately after exposure to a specific compound (e.g. Solvents or detergents). Allergic contact dermatitis requires 24 to 48 hours before the skin rash develops.

The most common contact allergen is nickel. Costume jewelry, watch faces and gold earrings, all of which contain nickel, can cause this type of reaction to occur. Fig.

1 Contact Dermatitis - due to an allergen. In this area a watch could be the culprit HOW DO I RECOGNIZE A CONTACT DERMATITIS REACTION? Contact dermatitis usually presents as an itching, red rash which may be associated with blister formation.

Skin can be ...

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