One: penile erectile dysfunction (ED): refers to the persistent inability of the penis to achieve or maintain an erection sufficient to obtain a satisfactory sex life, the duration of 3-6 months or more: ED is a complaint, symptoms, ED can not be called a disease; Western medicine: lack of hardness, erection does not last; Chinese medicine: atrophy and not lifting, lifting and not firm, firm and not long; two, the problem of ED and the growth of age does not have a direct According to the etiology, ED can be divided into the following three categories: organic ED: due to abnormalities or damage to the vascular, neurological, hormonal or cavernous system Psychological ED: due to the erectile mechanism of the central level of inhibition rather than organic damage caused by mixed ED: organic factors, psychological factors exist at the same time III, diagnosis: 1, ED screening methods IIEF-5 (International Index of Erectile Function) and CIEF (Chinese erectile function questionnaire) is a simple method of diagnosis. China erectile function questionnaire) is a simple and effective ED screening tool can use the IIEF-5 table for self-diagnosis. 2. Erection hardness grading – subjective method (1) Penis is enlarged but not hard. (2) The penis is hard but not hard enough for penetration. (3) The penis is hard enough for penetration but not completely hard. (4) The penis is completely hard and firm. 3, the routine diagnosis of ED general medical history: hypertension, diabetes, renal and hepatic insufficiency, atherosclerosis and cardiovascular risk factors such as hyperlipidemia; endocrine disorders, neurological disorders; medication and treatment measures; pelvic, perineal and penile injuries or surgery. Sexual history: – Origin, duration, progression and severity of erectile dysfunction, nocturnal and morning erections, masturbation, frequency of sexual life; changes in sexual desire; ejaculation; orgasm; intercourse-induced genital pain; spousal relationship, sexual function of spouse; Physical examination: physical appearance (secondary sexual characteristics, etc.); genitourinary system (penis, testes); cardiovascular (blood pressure, heart rate). Neurological system. Psychological assessment: personality questionnaire; anxiety-depression scale; sexual dysfunction and relationship factors questionnaire. Laboratory tests: blood and urine routine, fasting glucose, glycosylated hemoglobin (HBA1C), lipids, hypothalamic-pituitary-gonadal axis (LH, FSH, T, E2). NPT examination: accurate recording of erection time, number of times, cycle changes and hardness of the penis at night during sleep state; it can correctly diagnose psychological impotence or organic impotence and the degree of impotence, which is clinically important.