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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 what happens when a substance touching your skin causes irritation or an allergic reaction. It can result in all sort of welts, blisters, and itchy rashes. For example, the painful sores that come about after you touch poison ivy is an example of contact dermatitis.ed blotchy skin â whether itâs pigmentation scars from healed acne, unexplained uneven red patches, dry rashes, eczema, rosacea â always has an underlying imbalance that is the cause of the blotchiness.