Random inverted nipple: Causes?

As your breasts change after pregnancy and breastfeeding, your breast gland tissue can shrink.  As this happens, the milk ducts can get pulled in, pulling the nipple along with them.  If this happens and it bothers you, inverted nipple correction procedure can be performed.

Inverted nipples are caused by tightened breast duct tissue and may be due to a variety of reasons, such as genetics, trauma, pregnancy and lactation. Cancer isn't usually a cause. You can see a doctor for a physical examination if you are concerned.Surgery can correct this however if it doesn't bother you then you shouldn't be worried. If you are, please see your doctor for a physical examination for a better assessment. Best of luck.

Hello!  Inverted nipples is not uncommon amongst women.  Given your recent pregnancy, it can be a normal sequelae, which may resolve itself by itself.   Did you have an inverted nipple prior to your pregnancy?  Are you having any other signs or symptoms (e.g., nipple discharge or bleeding, pain, associated mass)?  It is good news that you are spontaneously able to evert the nipple.  Your condition sounds like a benign phenomena, but would certainly seek medical attention if the problem persists, or worsens, especially if this just arose recently.  Mammogram, ultrasound, and/or biopsy may be warranted if you do develop anything concerning.  But given your likely age, spontaneous eversion of the nipple, absence of pain and any other signs - it is likely a benign condition.  Hope that this helps!  Thank you for your question!  Best wishes and congratulations!