May be you should use a foam so that your breast look bigger because at your age you can't be in a surgery and secondly your are just minor why are you thinking that your breast bigger more because your just 12 and soon that would be possible / use foam

At 12 I don't think you should be worried about making your breast look bigger, but there are push up and padded bras.

The two main hormones which are responsible for the tenderness of the breasts and the sensitivity of the nipples during pregnancy are progesterone and oestrogen. Progesterone aids the relaxation process of smooth muscles in the womb facilitate the healthy growth and development of the foetus. It also fuels the generation of breast tissue. The side … Read more

Medical research has found that estrogen is the hormone responsible for breast tenderness and nipple sensitivity in the vast majority of cases. As the tissues found within the breasts experience slight changes during the menstrual cycle, they can become overly sensitive and this results in the extreme discomfort that many women experience on all too-frequent … Read more