Dandruff is mostly related to seborrheic dermatitis, psoriasis, ringworm, etc. The effect of shaving the hair is not obvious, and it needs to be treated according to the cause of the disease to be effective. 1. may be seborrheic dermatitis symptoms, you can use ketoconazole lotion, compound sulfur lotion and other hair wash, can be very good anti-dandruff and antibacterial, dandruff has a strong therapeutic effect. You can also use hormonal ointment such as mometasone furoate gel or calcium-modulated phosphatase inhibitors such as pimecrolimus ointment and other drugs. 2. It may be a symptom of psoriasis, which can be applied with vitamin D3 derivatives such as calcipotriol ointment and glucocorticoid ointment such as fluticasone propionate ointment. If necessary, you can take oral vitamin A acid drugs such as Avitamin A capsules and other drugs. 3. may also be caused by ringworm, this time you need to actively antifungal treatment, such as external ketoconazole lotion, miconazole ointment, oral itraconazole capsules, terbinafine tablets and other drugs. At the same time, you need to shave the hair, and the patient’s personal belongings, such as towels and pillows, need to be thoroughly sterilized to avoid contagion. If the symptoms of dandruff have not been relieved, the patient should go to the hospital in time to do symptomatic treatment. The medication should be used according to the doctor’s instructions.