How to get big with flat chest and small breasts can be achieved through autologous fat filling and breast implant. It is recommended that after the surgery, you should go to the hospital regularly for review to avoid discomfort. 1. Autologous fat filling: It is the excess fat tissue from other parts of the body, which is filled into the breasts after special processing, so that the breasts will become firm and plump, improve the situation of flat chest and small chest, and achieve the effect of bigger breasts, and generally there will be no allergy and rejection phenomenon. 2. Breast implant: you can go to the regular cosmetic surgery institutions, through the skin incision will be placed into the breast implant or pectoral muscle, you can achieve the effect of breast augmentation, and can be maintained for a long time, the effect is better, the risk is smaller. It is necessary to pay attention to the prevention of incision infection and pay attention to local hygiene. If there is any discomfort in the chest, it is recommended to go to the hospital in time. In addition, you can also improve the situation by exercising the pectoral muscles and other ways. It is recommended that people with flat chest and small chest do a good job of local care in daily life.