Chest refers to breasts, breasts on one side of the big and small can be improved through physical methods, can also do surgery to intervene, the causes are usually divided into physiological factors and pathological factors. 1. Physiological factors: normal people’s breast size is generally different, if the situation of a small breast is more obvious, the aesthetic impact, the patient can be improved through the breast area of the massage, but the effect is not particularly obvious. If you want to improve it, you can do fat transplantation or breast augmentation surgery, which can effectively improve the problem of large and small breasts. 2. Pathological factors: If the breast suddenly appears a small size, we should consider whether there are breast diseases such as tumors, etc., and need to go to the hospital in time to do ultrasound, molybdenum target, MRI and other examinations of the breast, and then according to the results of the examination to do the appropriate surgical excision treatment. Whether or not a small breast will affect the patient’s health depends on the cause, if it is caused by physiological factors is a normal phenomenon, it is recommended to observe regularly, if it is caused by pathological factors, the breast is big on one side and small on the other side, it is necessary to consult a doctor to clarify the cause of the disease.