Autologous fat injection breast augmentation is to suck out excess fat from fatty parts of the body through negative pressure and transplant it to fill the breasts, which can not only enhance the breasts but also shape the body, killing two birds with one stone, safe and without side effects, and is one of the more popular breast augmentation methods at present. Candidates need to undergo a comprehensive medical examination and laboratory tests before surgery, and women should avoid menstruation to ensure that the surgery can be performed safely. However, this surgery is not recommended for patients with breast lumps, blood disorders, scarring or those who are not psychologically prepared or have too high expectations. Although liposuction breast augmentation surgery is effective, it may also cause certain hazards, as follows: 1. damage to nerves, numbness in the operation area, hematoma, etc.; 2. infection and fat liquefaction may be caused because the operation environment and instruments do not meet the sterile requirements; 3. fat may be injected into the blood vessels accidentally due to the doctor’s unskilled technique, which may cause fat embolism; 4. uneven liposuction may cause uneven skin surface . These situations can generally be avoided, and only require that the patient choose a regular hospital and a professional doctor, and choose a suitable surgical plan to greatly reduce the post-operative risks.