Hair follicle implants can relieve the symptoms of hair loss, but they do not treat the cause of hair loss. Hair loss of more than 100 hairs per day in patches can be termed as alopecia areata. The causes of hair loss are many, and are considered to be related to genetic factors, mental factors, skin diseases, and other factors. Hair follicle transplantation alone is a surgical procedure to treat hair loss. Hair follicles can be extracted from non-hair loss areas (e.g., the posterior occipital area) and processed and transplanted to the area of hair loss or baldness, which can improve the local appearance. However, it should be noted that if the cause of hair loss is not completely removed, it may cause hair loss again, so it is necessary to pay great attention to remove the triggering factors as soon as possible to prevent recurrence of hair loss symptoms. It is recommended that patients should clarify the cause of hair loss as soon as possible, and cooperate with doctors to carry out standardized treatment to effectively improve the appearance.