Hair defects or shedding are mostly caused by burns, infections, various types of trauma and alopecia (more common in male patients), and leprosy can also cause hair defects. The so-called hair transplant is to completely remove some tissues around the hair follicle with special instruments, leave the scalp in place, and then transplant it to a place where hair is needed, prepared and conditionally accepted. This is hair transplant. Generally, you should consult before hair transplant surgery, and the attending doctor will tell you some precautions before surgery, such as avoiding alcoholism, smoking and washing your hair before surgery. Most of the power in the process of hair transplantation is in the hands of medical staff, as long as patients can relax. After the operation, the doctor will prescribe medicine for you to take after the operation, including anti-inflammatory and detumescence drugs and painkillers. As long as the hair follicle is not damaged in the process of cutting and transplanting, the blood supply of the pedicle of various flaps is not destroyed, the blood supply of the donor site is in good condition, and the correct plastic surgery operation is mastered, hair transplantation will generally succeed.