Bumps on nipple

I recently noticed a bump on one of my nipples that looks like a whitehead pimple and have been keeping an eye on it for about a week. It looks like it may have gotten a little smaller since I first noticed it, but I am still concerned. I know it is normal for women to have bumps on their nipples, but is there any easy way to differentiate between "normal" and abnormal bumps?

I am a 24 year-old female with some family history of breast cancer (my paternal grandmother had it in her  late 60's and survived).

[Cleveland Clinic]

Dear catlady0214, The skin on the breast is like skin on any other part of the body and is subject to a variety of conditions.  If this is not healing and concerns bring it to the attention of your doctor.