Male sexual dysfunction can be clarified by sex hormone test, erectile ability test and vascularity test. 1. The most common item is sex hormone, followed by biochemical tests, including liver and kidney function, blood glucose and blood lipid tests, are recommended. Rule out that it is due to hormonal abnormalities, resulting in sexual dysfunction, or caused by hypertension and diabetes. 2. Erectile ability appraisal test, including the nocturnal erectile function measurement called NPT, and the erectile function measurement under audio-visual stimulation, which is the measurement of the patient’s own erectile ability. 3. vascular examination, including ultrasound Doppler examination after injection of drugs into the cavernous body of the penis; angiography of the cavernous body of the penis after injection of drugs into the cavernous body of the penis. In addition, there are also neurological examinations, such as neuromuscular reflexes. When sexual dysfunction occurs, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.