you may have breast cysts or your normal breast tissue is reacting to hormonal changes during your cycle. either way it is important that you have your breasts properly examined. you can see your primary care medical provider or ask to see a gynecologist. you are correct that 15 year olds would not likely have breast cancer so the most logical explanation would be benign cysts or fibrocystic breast lumps but this cannot be conclusively determined blindly over the internet.
lumps in both breasts? . i am a 15 year old female kind of immature body wise for my age but i have lumps the same size in both breasts. if/when somebody bumps into me and accidentally hits my breast it is very painful. the lumps seem to not be connected in any way to the nipple however they seem to be fairly large. i know breast cancer is practically impossible for someone my age but what could it possibly be? . thank you!