Mometasone is a potent topical corticosteroid used to treat inflammatory skin conditions, such as eczema, psoriasis, and allergic reactions. It works by reducing inflammation, itching, and redness by suppressing the immune response in the affected area. Mometasone is typically applied directly to the skin and provides relief from symptoms of irritation and discomfort, making it effective for short-term management of flare-ups.