The chances of a 12 year old having breast cancer are very, very close to zero. It’s mainly a disease of ageing – 80% of those diagnosed are over 50, it’s rare in women under 40 and almost unheard of in under 25s.

The American Cancer Society recommends that women begin breast self-examination at the age of 20 – there’s a reason for that

The many changes in your breasts during the teenage years are hormonal and completely normal.

Please stop worrying, you are developing perfectly normally.