Hello, The nipple is the central projection in the areola. When the nipple is pulled in and points inward instead of out, it is termed nipple inversion or retraction. Nipple inversion can affect one breast or both, and can be congenital or acquired. Acquired nipple inversion can be due to benign or malignant causes, or it could be flat nipple, these will trouble only when you breast feed baby. Most of them can be managed by simply pulling nipple gently daily,a gynecologist will teach you proper technique. Please consult a gynecologist.