Strange sore

Kayla • May the beauty of life inspire you to love yourself in all you are.
I was taking a shower earlier and as I was washing myself I noticed a sore on my breast that looked like a blister but it didn't hurt. So I tried squeezing it in case it was a pimple of some sort and nothing came out. It is kinda red with a white center and I'm not sure what it is. Any ideas?