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Irritant contact dermatitis. Irritant contact dermatitis occurs when your skin comes into direct contact with a substance that damages the outer layer of your skin, causing redness, itching, and a burning or stinging sensation.
Introduction. Contact dermatitis is inflammation of the skin that occurs when you come into contact with a particular substance. It can be caused by: 1  an irritant â a substance that directly damages the outer layer of skin.2  an allergen â a substance that causes the immune system to respond in a way that affects the skin.ontact dermatitis is a type of eczema that causes the skin to become red, blistered, dry, scaly and cracked. This reaction will usually occur with a few hours or days of exposure to an irritant or allergen. Symptoms can affect any part of the body, but most commonly affect the hands and face.