Lamisil Cream is used to treat infections caused by a fungus. It works by killing the fungus or preventing its growth. Lamisil Cream is applied to the skin to treat: ringworm of the body; ringworm of the foot (interdigital and plantar tinea pedis; athlete’s foot); ringworm of the groin; tinea versicolor (sometimes called “sun fungus”); and yeast infections of the skin (cutaneous candidiasis).