Erectile dysfunction is mainly considered a manifestation of erectile dysfunction, which may be related to psycho-psychological factors, drug factors, disease factors and so on. 1. Psychological factors: lack of sexual skills, psychological pressure, nervousness, fear and depression, schizophrenia and other mental illnesses can trigger erectile dysfunction. 2. Drug factors: during the application of thiazide diuretics, valium and other drugs, some patients may experience erectile dysfunction and other adverse reactions. 3. Disease factors: such as prostatitis, small penis, pituitary tumors, arteriosclerosis and diabetes, etc., is also an important cause of erectile dysfunction. There are other reasons for erectile dysfunction, and it is recommended that patients should seek timely medical examination to clarify the cause of the disease, and targeted treatment under the guidance of the doctor.