Hair follicles generally do not regenerate, the number of hair follicles in the human body is generally more constant, after necrosis can not be regenerated. Hair follicles belong to non-renewable resources, if the hair follicles have been necrotic, then non-renewable, this cause of hair loss can only be solved by transplanting hair follicles. However, it is recommended that you go to the hospital for a checkup. If it is simple follicular atrophy, then with timely and continuous care, it is also possible to alleviate the symptoms and slow down the progress of the disease. Hair follicle necrosis may be caused by trauma, or it may be caused by laser stimulation and so on. It is recommended that patients go to the hospital for examination to determine whether their hair follicles are temporarily atrophied or necrotic, and then take the next step under the guidance of the doctor.