Hairline implantation is a surgical method of restoring the hair that was once lost as well as the non-growable hairline area to a lush state by implanting hair follicles. Most patients can get more satisfactory results after hairline implantation. A small number of patients can have the following risks due to improper postoperative care or other reasons: 1. Bleeding: before this operation, the patient’s coagulation function should be evaluated to see if it is normal, with or without thrombocytopenia, etc. under the doctor’s auxiliary examination; 2. Infection: if the doctor operates improperly or the patient’s own conditions are poor, the infection can occur after the operation, accompanied with malnutrition status such as anemia, hypoproteinemia and so on, and it can also occur Diabetes, folliculitis, acne, etc.; 3, scalp numbness: some patients may experience numbness and pain in the back of the head, which may be due to the surgical process, superficial sensory nerves are damaged caused by the surgery, and generally relieved after 0.5-2 years of time; 4, scarring: no matter what kind of surgery, there is a possibility of scar formation, and if the patient is a keloid, the patient should avoid hair transplantation; 5, alopecia patches of the area of the supply of hair, the scalp numbness, scarring; 6, poor survival of planted hair, different directions and poor results. Therefore, it is recommended that when candidates undergo hairline implantation surgery, they should choose a professional organization and have this operation performed by an experienced doctor.