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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.
Causes. Hives are attributed to allergic reactions linked to medications and foods, according to the American Academy of Allergy, Asthma and Immunology. Medications also can cause allergic contact dermatitis, but the rash doesn't always look like bites.Other causes of bite-like rashes associated with contact dermatitis include cosmetics, poison ivy and metals such as mercury and nickel.ome types of allergic reactions can translate to rashes on the body, which can range from dry scales to raised bumps. Such bumps can appear to look like insect bites, but the difference lies in the fact that other symptoms will accompany the bumps if they are attributed to an allergic reaction.