Hello, many lumps on the outside of the breasts that hurt are benign, and mean nothing. Lumps that do not hurt when you press down on them, and are in and around the lobules/stroma of the breast are cancer lumps. Breast cancer occurs in the lymph system.
Certain moles also indicate cancer. Melanoma with asymmetrical and uneven flat edges are cancer moles. Melanoma with symmetrical, even edges are noncancerous moles. Here is a link for cancerous moles. (https://www.google.com/search?q=images+of+cancer+moles&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjj7ZuJq5vRAhXrhVQKHfaUCdIQ_AUICCgB&biw=1366&bih=638)
Breast cancer primarily occur in lymph nodes under the arm (axillary nodes), lymph nodes around the collar bone (supraclavicular and infraclavicular lymph nodes), and llymph nodes inside the chest near the breast bone (internal mammary lymph nodes).
If you have nipple discharge, flaking of the nipples, and painless lumps, that is definitely a sign of cancer. I hit my left breast on the edge of my desk about a week ago, it formed a small lump and it hurt-- but it went away within a few days. You should be alright, but if you are concerned a about it, you should ask your mother about it.
Hi, at 13, this is a good thing to show your mother. She'll want to know and can decide if you need to see a doctor or not. good luck
I don't think you should be concerned your still going throw puberty so your going to have lots of changes in your body .