Hair transplantation usually cannot use other people’s hair follicles to avoid adverse consequences. Everyone’s hair condition may be different, and even if the transplant is successful, it will still cause certain differences, such as the degree of hair thickness and luster, etc., which can exist to a certain extent. Secondly, as the number of hairs involved in a hair transplant can be up to a hundred or even a thousand, it may be difficult to find a suitable donor, which in turn may affect the efficiency of the hair transplant. In addition, the body may activate the immune system to kill the foreign body if it is found in the body. Therefore, when foreign hair follicles are transplanted, the hair follicles may be processed by the immune system, and the inability of the follicles to survive represents a failure of the hair transplant. Hair transplantation is usually done using one’s own hair follicles. If there is insufficient donor in the posterior occipital region, the procedure is usually not recommended. Patients are advised to choose regular medical institutions and be treated by professional doctors.