The nipple is in the center of the areola. Each nipple has about nine milk ducts, as well as nerves. Areolae: The areola is the circular dark-colored area of skin surrounding the nipple. Flat or inverted nipples can be a potential problem for women wishing to breastfeed. Through gentle suction the pulls the nipple out into a small plastic thimble-like cup. In a matter of weeks of continued wear the nipple will stay permanently erect.