Inverted nipples are fairly common, especially in females. It is a condition in which the nipple, instead of pointing outward, is pulled into the breast. This is due to short and tight milk ducts pulling on the nipple.
There are 3 different grades of inverted nipples:
Grade 1: the inverted nipple can easily be pulled out by applying pressure using fingers over the areola and rarely retracts after being manipulated. Grade 1 inverted nipples may also occasionally pop out without any manipulation or pressure. Women with grade 1 inverted nipples are often able to breastfeed.
Grade 2: the nipple which can be pulled out (although not as easily as a Grade 1 inverted nipple) but the nipple retracts once the pressure is released. Breast feeding may be possible with grade 2 nipple inversion but it is more difficult than in grade 1.
Grade 3: the nipple is severely retracted and can rarely be pulled out with physical manipulation. Milk ducts are often very constricted and breast feeding is not usually possible.
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