Hair transplantation is currently an effective clinical treatment for persistent baldness and baldness, most patients can achieve satisfactory results, a few patients may experience complications after surgery, mainly including the following: 1. postoperative infection: local skin infection may occur after improper postoperative care, which can be treated with antibiotics; 2. scar: for patients who choose the fut method of hair transplantation, the wound of the cut scalp strip will be left after suturing A thin scar will be left behind after the suturing of the scalp strip, but it is usually invisible with hair cover. For patients who choose fue hair transplant, white dotted scar will be left behind after the operation, and the hair in the extraction area will be slightly scarred, but it will not affect the overall appearance; 3, the hair is not alive after transplantation: due to various reasons, the hair cannot grow after transplantation. shedding, which lasts until 2 months after surgery. From 3-4 months after the surgery, the shed hair will gradually grow out, and there will be initial effect in 6 months after the surgery, and the best effect will be achieved in about 1 year. Therefore, it is important to be patient after hair transplant surgery and contact your doctor for follow-up if there is any situation. The degree of hair loss is different for each person and it is impossible to estimate the final degree of hair loss, which may also develop and worsen after the first hair transplant is performed. If the hair loss progresses, another hair transplant may be required. If there are individual areas of hair that do not survive well, or if you feel that the transplanted hair is sparse, you will need to undergo hair transplant surgery again in a year to encrypt the hair. When choosing hair transplant surgery, you must go to a regular institution and find a professional doctor to perform the surgery to ensure the safety and results of the surgery.