Breast malformation includes congenital breast malformation and acquired breast malformation. Congenital breast malformations are mainly caused by congenital developmental abnormalities, and acquired breast malformations may be caused by accidents such as trauma and surgery, and may also be caused by diseases or endocrine abnormalities. Common breast malformations are: 1. Mammary gland, which is too small and out of proportion to the whole body shape, that is, mammary gland. Dysplasia and endocrine influence are the main causes of macromastia. Partial mastectomy caused by various diseases can also make the breast too small. Breast augmentation is the main treatment. That is, an appropriate artificial breast prosthesis is implanted under the breast or pectoralis major to enlarge the breast. Generally speaking, this kind of breast plastic surgery is simple and effective. The problem is that the quality of breast prosthesis must be excellent to avoid discomfort in later breast contraction. Second, the breast size of macromastia is too large, which will produce many symptoms. If the patient is troubled, it is called macromastia. The real reason is unknown. It is generally believed that breast tissue may be over-sensitive to endocrine stimulation. In addition, obesity and heredity may also be pathogenic factors. The treatment is mainly surgery. The indication of operation depends on the clinical symptoms and the patient's strong desire. For those with poor general health, surgery has certain risks and should be regarded as a contraindication for surgery. For those whose subjective feelings are inconsistent with the objective situation, and those who have unrealistic high expectations for the effect of breast plastic surgery, surgery is generally not suitable, or must be cautious. The surgical method is breast reduction plasty, and the vertical double-pedicle method is often used. Three, lack of milk or lack of milk in some patients with normal nipple development, the other side of the breast is missing, or only one recessive breast, but no obvious nipple. Treatment can be based on the patient's requirements, considering breast reconstruction on the missing side, or using prosthesis implantation. Fourthly, bell-shaped breast is a rare breast deformity. The breast is small, and the areola area is prominent and bell-shaped. The treatment method can be breast augmentation, and at the same time, part of the areola and the underlying glands are removed to make them tend to normal shape. 5. Patients with Polish syndrome have not only congenital absence of breast, but also absence of pectoralis major, upper limbs and finger deformities. All deletions or deformities often occur on the same side, especially in girls. Breast reconstruction can be considered for treatment, and some patients can only put a prosthesis under the skin for breast augmentation surgery. Because there is no pectoralis major, the effect of breast plastic surgery may not be ideal. In order to achieve bilateral breast symmetry, some cases are willing to consider reducing normal breasts at the same time. Sixth, bilateral breast asymmetry sign Generally speaking, the size and shape of the breasts on both sides are difficult to be completely symmetrical, and slight differences are often not noticed by themselves and do not require special treatment. There are several cases of breast asymmetry caused by unilateral or bilateral breast dysplasia or acquired endocrine influence: 1, bilateral small breasts are asymmetrical, and bilateral unequal breast augmentation is feasible; 2. Bilateral breast hypertrophy is asymmetrical, bilateral unequal reduction or plastic surgery is feasible. 3. One side of the breast is stunted and the other side is normal. It is feasible to treat breast augmentation with small breasts. 4, one side of the breast hypertrophy, the other side of the normal size, treatment can be used to reduce the hypertrophy side of the plastic surgery. 5, one side of the breast is small, the other side is hypertrophy, and the treatment is feasible for small breast augmentation and hypertrophy side reduction plasty. 6. For patients with severe breast ptosis, breast suspension is sometimes needed.