How To Treat A Hard Spot In The Incision Of Nipple After Breast Reduction Surgery?

I had a breast reduction 8 years ago and about 2 years ago I noticed a little hard spot near one of my nipple incisions. I can see it when I pull the skin back. It's smooth and somewhat moveable. I can't tell if it's getting bigger or not, but I'm wondering if I should have had it checked out all this time. My mother is a nurse and she says it's either scar tissue or a fibroid. I have no family history of cancer. I'm 26. Should I be concerned?