The human body in a state of tension will make the sympathetic nerve excitability increase, and the male erection process is dominated by the parasympathetic nerve, if the psychological tension is too much, the sympathetic nerve will dominate, so the parasympathetic nerve excitability will be reduced, which will lead to a decline in the impulse of the erection nerve, and therefore the phenomenon of weakness will occur. Generally this situation is mainly due to psychological factors, as long as the timely adjustment and psychological guidance, often in the process of later sexual life will not appear erectile dysfunction, if the long time repeatedly erectile abnormalities, it is recommended to check the erectile function test, and at the same time to make clear the penile erection of the nerve and blood vessels whether there is an intrinsic disease, such as some of the diseases caused by the sexual dysfunction of the complications, such as diabetes, hypertension, rheumatism, and so on, and so forth. Diseases such as diabetes, hypertension, rheumatism and immune system diseases or other consumptive diseases, such as tuberculosis and tumors can lead to abnormal energy and metabolism, which can lead to a decline in sexual function.