[prettylily]

It might actually end up being hormonal, especially if they occur more often during a particular part of your cycle. Sorry I can't be more help.

http://www.pregnancy-info.net/forums/signs_of_pregnancy/pimples_on_nipples_not_areola_/

When you pregnant you can get white pimple like things on your nipples, but hormones before your period can also make them look this way.

[anima88]

acne on nipples? cmon

[myboobs]

acne on nipples? cmon

Acne can happen anywhere on the body . I had one on my penis when I was in my 20's and kept on reoccurring