The common abnormalities of breast development are parastomalacia (polymastia), asymmetric breast deformity, Poland syndrome, gynecomastia, and gynecomastia. Most of the lesions are bilateral, with one or more baby breasts appearing above or below the normal breast; or only a little skin pigmentation, which is the original areola; or only a partial thickening of the skin, which is the nipple of the parametrium; or there may be both nipple and areola. The parametrial breast can sometimes develop to a full extent into adulthood, with significant swelling before menstruation and even milk production during lactation. The treatment for parametrial breast is to remove the nipple and breast tissue according to the specific situation, or to use a combination of fat aspiration or fat aspiration and excision. 2, breast asymmetry The cause of the disease is still unclear, manifested by the uneven development of both sides of the breast, a large and a small, serious development of only one breast or a side of a hidden breast tissue. Common types of breast asymmetry and treatment principles are as follows: (1) bilateral breast dysplasia and asymmetry need to perform bilateral unequal breast enlargement; (2) unilateral breast dysplasia, need to perform unilateral breast enlargement; (3) one side of the breast hypertrophy, the other side of the dysplasia need to perform hypertrophy side reduction, small breast side enlargement; (4) unilateral breast hypertrophy need to perform unilateral breast reduction; (5) asymmetric (5) asymmetric breast hypertrophy requires unilateral breast reduction; (6) breast asymmetry caused by the trunk temple such as chest wall or spinal protrusion deformity distortion, the structure of the thorax, resulting in breast asymmetry, when it is only necessary to raise the lower breast to the level of the higher breast. 3.Poland syndrome refers to congenital unilateral pectoralis major, pectoralis minor, breast, nipple, areola, hypoplasia or lack of development, often combined with hand and arm deformities, especially often combined with short fingers and parallel fingers deformity of the hand. Except for the hand deformity, the syndrome has little functional impact on daily life, so the treatment mainly consists of adjusting the shape of the anterior part of the chest, including the breast. In the absence of the pectoralis major muscle, the thick anterior axillary margin disappears and the anterior chest wall is flattened compared to the opposite side, which is a problem even in males, but in females due to hypoplasia or absence of the affected side of the breast, the need for plastic surgery is even greater. In female patients with breast agenesis, the nipple areola is usually positioned higher than the healthy side, and it is necessary to obtain correction of this position anomaly along with breast reconstruction. In Poland syndrome, the breast reconstruction procedure is chosen according to the degree of absence of the pectoralis major and minor muscles, and sometimes the affected side can be filled with appropriate size silicone gel implants for augmentation to make both sides of the breast symmetrical, harmonious and balanced. If the absence of pectoralis major and minor muscles is serious, it is difficult to recreate a satisfactory chest wall and breast, commonly used to increase the breast by transferring the latissimus dorsi muscle and the latissimus dorsi muscle to rebuild the pectoralis major muscle for treatment, will obtain satisfactory results, female patients can wear swimsuits and participate in all social activities with confidence as normal people after surgery.