An inverted nipple is an irregularity in which nipples point more inwards than outwards. They can occur on one or both breasts. It’s estimated that 9 to 10 percent of women have at least one inverted nipple. In most cases, having an inverted nipple won’t affect you. This natural occurrence doesn’t increase your risk for any health complications, however, they can be reversed for aesthetic reasons. breastandbody.co.uk