I am just a teen and I have just today and yesterday got this terrible stinging pain in my right nipple (it almost feels like pulses). I am about to get my period in 10 days or so and recently started to masturbate (in case that has to do with it ( maybe hormonal imbalance? ) ). I But I stopped a day or two, and my right nipple started to sting. I looked in the mirror that night and I had like a little dried drop of blood to the look of it.. And then I had just a shirt on (no bra) I tried to sleep but the pain keep hurting. I then applied lotion. It was advanced therapy lotion ( I tried using something scentless that wouldn't irritate it more ). It was still hurting but I fell asleep. The next day at 2 of so in the afternoon, the pain came back, and faded away.. It came back again at 5 and is still here.. It is only in my right nipple and the pain is external.. This breast is smaller than my right so it may be a loose fitting bra but I have no money to buy another. The reason that this is terrifying me is because I have a mole/beauty mark on my chest just above my breast and it has changed.. The middle has stayed in a dark brown and the outside looks like it was just stretched.. This happened about 3 months ago.. PLEASE HELP! I am really scared.. Any response will work.. Thanks. Me.