Kenalog is used to treat a variety of skin conditions (e.g., eczema, dermatitis, allergies, rash). Triamcinolone reduces the swelling, itching, and redness that can occur in these types of conditions. This medication is a medium- to strong-potency corticosteroid. The potency depends on the strength and the form that you use. For details on the potency of your product, ask your pharmacist.