This medication is used to treat skin conditions such as eczema, psoriasis, allergies, and rash. Mometasone decreases swelling (inflammation), itching, and redness. Mometasone is a medium-strength corticosteroid. This medication is available in several forms including cream, ointment, and lotion (solution). Your doctor will choose the type of product based on the skin condition/area of the body being treated.