Hello, impotence is a sexual dysfunction disease with rising incidence. Refers to the fact that although men have physiological needs, the penis can not be erected or the erection degree is not enough to be inserted into the vagina, which affects normal sexual life. In order to diagnose the actual cause of the disease, besides blood and urine analysis, routine examination of prostatic fluid and semen, liver and kidney function, blood electrolyte, blood sugar and blood lipid, and thyroid function, serum testosterone (te), thyroid stimulating hormone (LSH), luteinizing hormone (LH) and prolactin (PRL) should also be determined. I hope it helps you, and I wish you health!