Topical ketoconazole is used to treat skin infections caused by fungus or yeast, working to inhibit fungal growth. Ketoconazole cream is used for treatment of tinea corporis (ringworm of the body), tinea cruris (jock itch), tinea pedis (athlete’s foot), tinea versicolor (“sun fungus”), cutaneous candidiasis (yeast infection of the skin), and seborrheic dermatitis.