The breast nipple is the center most point of the areola of the breast.
In most women the dome is turned outward, if pulled in it’s termed inverted or retracted, but they are technically different conditions. One that is retracted is specifically ‘drawn’ inward.
If you are born with one or the other inverted, this will likely persist, and not be a sign of any breast issues.
One or both the nipples may be inverted.
If there is a sudden change to your nipple configuration it could be a sign of infection, cancer, or other underlying process.
Some surgical removals of masses can lead to nipple inversion.
Most women with nipple inversions will not need any evaluation or treatment, but everyone with this condition should discuss with your gynecologist.