Any other reason other than pregnancy?

There are plenty of reasons why your nipples could get dark. Mine get dark if I take narcotics haha. Sometimes your period can change the color slightly or stress/diet ect.

Try not to fret about them too much unless they start hurting or get VERY dark then you probably want to see a doctor.

Besides a woman’s breasts being tender and swollen early in the first trimester of pregnancy, a woman may notice changes to her areolas and nipples. New hormones running through her body may cause your nipples to become bigger and darker than they normally are.

As your breasts get bigger, your nipples naturally get bigger as well. The darkening of the nipples is caused by a temporary increase of melanin, the natural pigment that your body produces that gives your hair, skin and eyes their color. For most women, within a few months of having their baby, the nipples will return to their normal color and size. If a woman is breastfeeding, the nipples may not return to their normal size until after she weans her baby.

Another change in the nipples that a woman may discover once she gets pregnant are the Montgomery’s tubercles (glands or little bumps surrounding the nipples) getting bigger, elevating and becoming more prominent. Not all women experience this, and some may not experience it till the second or third trimester.

If you do not believe you are pregnant, there are other things that can cause these changes n your nipples. Weight gain can cause your breasts to enlarge, therefore causing your nipples to enlarge. If you like to tan, your nipples may become darker. A hormone imbalance may cause your nipples to get darker, or left over melanin from a previous pregnancy may cause this darkening. If you are not sure what is going on with your body, be sure to ask your doctor.

do a blood preg test,more accurate............if persists ,see gyn doc............maybe ya hormones are off/low/high......................i think poly cystic ovary can cause this,unsure..........