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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.
Contact dermatitis. Contact dermatitis is one of the most common causes of rashes. Contact rashes occur when the skin comes into direct contact with a foreign substance that causes an adverse reaction, leading to a rash. The resulting rash may be itchy, red, or inflamed. Possible causes of contact dermatitis include: