Breasts are too small and need to be conditioned and treated according to the causes in order to become bigger. Common causes of breasts being too small include excessive dieting, hormone level changes, genetic factors, breastfeeding, etc.; methods of improvement include life conditioning, use of medication (Prednisone, etc.), and surgical treatments (breast augmentation surgery, etc.). 1. Excessive dieting: Due to women’s excessive pursuit of a slim figure, excessive dieting to lose weight will lead to a decrease in the fat content of the breasts, making the breasts shrink. Women should pay attention to avoid excessive dieting and should eat more food rich in high protein and fat to ensure sufficient nutrition. 2. Hormone level changes: If the hormone level changes in the body, targeted treatment can be carried out; for example, follow the doctor’s instructions to use hydrocortisone, prednisone and other drugs to supplement the adrenocorticotropic hormone, but can not be abused. 3. Genetic factors: for genetic factors lead to the chest is too small, through the life conditioning generally can not be improved, if there is a need, breast augmentation surgery. 4. Breastfeeding: After breastfeeding, breasts will shrink to the previous state, or may be smaller than before; if necessary, breast augmentation with autologous fat, silicone breast augmentation and other surgeries to improve. It is recommended that women with small breasts should seek medical treatment in time and carry out appropriate treatment strictly under the guidance of doctors.