Impotence, you can go to the hospital for blood biochemical examination, hormone level measurement, prostate specific antigen examination and other tests to clarify whether the organism is impotent. 1. Blood biochemistry examination: generally includes blood sugar, blood lipid, liver and kidney function, etc., which can timely discover whether the organism has diabetes, abnormal lipid metabolism and other diseases. If the blood biochemical examination of uric acid, homocysteine, etc., appear abnormal, there is a certain judgment on impotence. 2. Hormone level measurement: including testosterone, prolactin, thyroxine, estradiol, luteinizing hormone measurement, etc., to detect whether the body is suffering from endocrine diseases have some help. The level of male androgen testosterone has a certain effect on erectile function and the strength of libido, so it has a certain auxiliary role in the diagnosis of impotence. 3. Prostate specific antigen test: usually can reflect the prostate tumor on the specificity of the index, prostate specific antigen test can find out whether the organism suffers from prostate disease, prostate disease belongs to the impotence of the original disease, thus have a certain diagnosis of impotence. In the hospital for the examination, should relax the mind, avoid excessive tension, before the examination should pay attention to local hygiene and cleanliness, reasonable diet.