A contact allergy, also known as allergic contact dermatitis, is a skin reaction that occurs when the skin comes in contact with an allergen or irritant. Some synonyms for contact allergy include skin allergy, dermatitis, allergic rash, or contact eczema. These conditions are caused by various triggers, such as cosmetics, fragrances, metals, or latex. Symptoms may include itching, redness, swelling, blistering, or scaling of the skin. It is important to identify and avoid the trigger allergen to prevent further reactions. Some treatments for contact allergy include topical or oral medication, or desensitization therapy. Consult with a healthcare provider for proper diagnosis and treatment options.