Hair loss may be related to ageing, immune abnormalities, androgenetic alopecia and other factors; hair loss should first clarify the cause of the disease, according to the different causes of the disease, targeted use of drug treatment. 1. Ageing: some patients’ hair loss is related to ageing, such patients can be treated with topical minoxidil tincture and pay attention to maintaining a healthy lifestyle. 2. Immune abnormalities: some patients may be caused by immune-related diseases of hair loss, such patients need to actively treat the primary disease. For example, for hair loss caused by lupus erythematosus, local injection of steroid medication can be used. 3. Androgenetic alopecia: some patients have hair loss related to abnormal androgen levels, and such patients can take finasteride, spironolactone tablets and other drugs under the guidance of the doctor. Patients should develop good living habits, avoid staying up late for a long time, and pay attention to strengthening physical exercise to enhance resistance. In the treatment of medication, must follow the doctor’s instructions, the rational application of drugs, do not arbitrarily use drugs, to avoid causing serious side effects.