Wearing hats regularly does not cause hair loss. Wearing a hat belongs to a daily habit, in addition to affecting the direction of hair growth, will not have too much impact on the growth rate and thickness of hair. In the clinical causes of hair loss, mainly in seborrheic alopecia, baldness, ringworm, female postpartum hair loss and so on. For different causes of hair loss, different treatments are needed. To improve the symptoms of seborrheic alopecia, it is necessary to give vasodilating and androgen inhibiting drugs such as finasteride; to improve the symptoms of baldness, it is possible to use topical tincture of minoxidil; to improve the hair loss caused by ringworm, it is necessary to choose the treatment of anti-fungal drugs, etc.; women’s post-partum hair loss is related to the change of hormone levels after childbirth, and will generally recover gradually. All of the above drugs need to be used in accordance with medical advice. For the symptoms of hair loss, we must go to the hospital in a timely manner to clarify the cause of the disease, and then for the cause of the treatment, do not blindly use their own medicine.