The causes of erectile dysfunction include psychosomatic and organic factors. 1. Psychosomatic factors: refers to erectile dysfunction caused by nervousness, stress, depression, anxiety and husband and wife relationship disharmony and other psychosomatic factors. Such as daily husband and wife relationship disharmony, lack of sexual knowledge, bad sexual experience, life and work or economic pressure. 2. Organic factors: (1) Vascular causes: vascular lesions are the main cause, including any disease that may lead to reduced blood flow in the penile cavernous artery, such as atherosclerosis, arterial injury, arterial stenosis, pubic arterial shunt and cardiac function abnormalities, etc., or have obstacles to the venous return closing mechanism of the penile tunica albuginea, the penis cavernous sinus of the penile venous leakage due to the reduction of the smooth muscle in the penile cavernous sinus. (2) Neurological causes: central and peripheral nerve disease or injury can lead to erectile dysfunction, central such as stroke, tumor, Parkinson’s disease, spinal cord lesions, lumbar disc disease, multiple sclerosis, multiple atrophy; peripheral neuropathy such as diabetes mellitus, alcoholism, uremia, polyneuropathy and so on. (3) Surgery and trauma: Large vessel surgery, pelvic or retroperitoneal surgery or trauma, such as radical prostate cancer surgery, abdominal perineal rectal cancer radical surgery and other surgeries and pelvic fracture, lumbar vertebrae compression fracture, or straddle injuries, can cause penile erection-related blood vessel and nerve damage, resulting in erectile dysfunction. Erectile dysfunction may also be caused by other factors, and it is recommended that patients go to regular hospitals for timely consultation and treatment to strive for early recovery.