On the bright side, this almost certainly isn't cancer. This being said, what you're describing sounds like to stereotypical appearance of a skin infection, which can be caused by a variety of factors. Take care to make sure the clothes covering the area where the infections have originated haven't been irritating your skin; small abrasions from ill fitting or rough clothing might proved an entry point for bacteria. Hopefully you won't have to deal with another on of these, but if the problem persists you may want to contact a doctor simply to obtain some mild antibiotics which will clear up the infection. Regardless, don't worry yourself too much, this is a fairly common problem and very easy to treat.

It won't be cancer. Cancer is damaged cells and chances are, if you had breast cancer, you wouldn't get a lump on both breasts.

Calm down, it's not cancer!What you've described sounds like oil glands on the nipple. They are 100% natural and safe, and prevent the skin in that area from drying out. In some women they are barely noticeable and in others they are quite obvious - it sounds like a couple of yours have gotten bigger than the rest, which makes them stand out, but that's completely normal and happens to a lot of women. If they make you self conscious, you can gently squeeze them with your fingers and the oil (which looks like white pus, but isn't) should come out. This will make them fade a lot quicker but don't go around squeezing all of them because your skin could dry out and become sore, itchy and flakey. That's exactly what I did, and my doctor told me to leave them alone because they're not doing any harm - so now I only squeeze the ones that are bigger than the others.

This is pure and simple acne type pimples. You have approached that age where new harmones are being released and you are approaching women hood. That is it do not pay much attention to small boils keep the area cleaned and cool with splash of powder and pay attention to the size of bra it should be comfortable and not very tight.Do not even think of cancer and do not jump on things on which you have no knowledge. Cancer is not pimple like, Cancer of breasts is something which happens in the deeper tissues of the breasts. When you pinch the breast deeper to cover the whole breast if at any point you feel a round hardened tissue, it is to be checked.. Even that also may not be cancerous but if it is felt on self examination one should go for a test. You are too young for all this put your attention and energies in positive things of life.