Many hydrocortisone ointments or lotions "float" on the skin's surface, taking 30 minutes or more to stop the itch. Corticool carries the hydrocortisone deep into the skin, giving long-lasting relief with the immediate cooling of a clear, non-staining, menthol gel. Corticool works for rashes related to poison ivy, oak and sumac, insect bites, eczema, soaps, detergents, cosmetics, jewelry, seborrheic dermatitis and psoriasis.