Impotence, also known as erectile dysfunction, is the inability of the penis to erect or maintain an erection during sexual intercourse to achieve a satisfactory sexual life. There are three key words from this concept: unable to get an erection, unable to maintain it, and unable to achieve a satisfactory sexual life. To judge a man’s erectile function can be analyzed from these three aspects, of course, the degree of satisfaction with sexual life of each person’s standard is different, so from the first two key words have one of them can be considered to have erectile dysfunction. 1, can’t get an erection: there is any situation in the room not to lift the typical, there is selective not to lift, that is to say, to a specific environment, a specific sexual object and a specific sexual way not to lift, the former condition is more complex, the latter is mostly mental psychological factors. 2, can not maintain an erection: the performance of the lift but not firm, firm but soon the case. In layman’s terms, the hardness is not satisfactory enough. This aspect requires medical examination to find the cause, some may be vascular and other organic reasons, some may be psychological reasons. 3, if you can both erect and maintain a good erection, but the current level of erection than the previous youth receded, this requires a specific analysis, some are the result of sexual function stabilization with age, such as a 30-year-old person sexual function is certainly more stable than 20-year-old people, sexual function fluctuates greatly at the beginning of the love sinus, when the sex hormones may be too strong and cause sexual impulses more frequent and The healthy adult male should not pursue such sexual function.