Cushing syndrome occurs when your body has too much of the hormone cortisol over time: your body might produce too much cortisol. This can result also from taking oral corticosteroid medication. Too much cortisol can cause some of the hallmark signs of Cushing syndrome — a fatty hump between your shoulders, a rounded face, and pink or purple stretch marks on your skin. Treatments for Cushing syndrome can return your body’s cortisol levels to normal and improve your symptoms. The earlier treatment begins, the better your chances for recovery.