1, age With the increase of age, the progressive decline in erectile function. 2, chronic diseases (a) endocrine diseases (hyperthyroidism, hypothyroidism, hyperprolactinemia, diabetes mellitus caused by neurological and vascular complications, etc.) (b) cardiovascular diseases (coronary heart disease, hypertension, hyperlipidemia, etc.) (c) neurological diseases (neuropathy caused by multiple vascular sclerosis, temporal lobe epilepsy, etc.) 3, psychological factors (a) husband and wife have disharmonious relationship; (b) social, family, environmental influence; (c) anxiety and depression 4, drug effects Antihypertensive diuretics, antipsychotics, etc. 5, bad habits (a) long-term alcoholism (b) a large number of cigarettes (c) drug abuse 6, genitourinary surgery, medically originated damage to penile nerves, blood vessels