Hair loss is a disease caused by a combination of factors, most of which relate to reduced immunity, frequent staying up late, anxiety, tension, or deficiencies in vitamins, trace elements, and anemia. In some cases, excessive secretion by sebaceous glands can also be a contributing factor. It is not necessarily caused solely by a lack of vitamins or trace elements. If you really want to determine the cause, you can visit the dermatology department of a regular hospital for a blood test to see what vitamins or trace elements you may be lacking. If the hair loss is not caused by these factors, then treatment should address the other underlying causes. The treatment of this disease takes a long time, with at least a three-month course of treatment required. It is essential to persist with the treatment over the long term; otherwise, the effects will not be satisfactory. Moreover, it is advisable to strengthen physical exercise, increase the intake of vegetables and fruits, avoid spicy and stimulating food, and avoid staying up late.