Chinese medicine believes that the causes of impotence are mainly due to kidney deficiency as well as liver depression and qi stagnation, blood stasis, etc. Wu Zi Yan Zong Wan mainly treats impotence caused by kidney deficiency and has good results after application as long as the identification is precise. Because Chinese medicine is concerned with the treatment of evidence, not all impotence can be treated with Wuzi Yan Zong Pill. The type of impotence caused by kidney deficiency can be judged from the following aspects: 1. erection is not firm, accompanied by soreness and weakness of the waist and knees. 2. urine is not drained. When men have sexual dysfunction, when buying drugs to treat improve erection, especially proprietary Chinese medicines, be sure to choose the drug under the guidance of a specialist physician or pharmacist.