Impotence is a very common sexual dysfunction, which is mainly manifested as difficulty in erection during coitus, erection is not hard or erection does not last long, thus affecting the quality of sexual life. The causes of impotence are complex and the treatment is easy to repeat. Only when we know under what circumstances we are prone to get impotence, can we be able to be aware of the early prevention. A large number of research evidence shows that if you have the following factors, then you get impotence will be much more likely! 1, have a bad habit of life The medicine also refers to this bad habit of life as bad lifestyle. For example, smoking, drinking, drug abuse and other bad lifestyle has the potential to cause impotence. Smoking has a significant effect on erectile function, and smokers are at a much higher risk of future impotence. The larger the amount of cigarettes smoked and the longer the age of the smoker, the greater the likelihood of impotence. Alcohol consumption is also the case, foreign people on 17,000 people who drink more than 37 years of research, found that the prevalence of impotence is as high as 80%, and give up drinking for many years, half of them still failed to restore erectile function. In addition, usually inactive, obese and like to stay up late people, is also easy to get impotence. Especially at present in some metropolitan areas, the fast pace of life, work pressure, often work overtime and stay up late, the opportunity for outdoor activities is becoming less and less, obesity and subfertility is a very common phenomenon. The possibility of impotence will also rise quietly. 2, low self-confidence and lack of sexual knowledge The quality of penile erection is easily affected by psychological factors, only in a completely relaxed situation penile erection can play to its best state. In some newly married couples, due to over-excitement and inexperience, it is easy to ejaculate too quickly, erection is not hard, or the problem of unsuccessful coitus, which is a very common phenomenon, most people will be dealt with correctly and gradually return to normal. For some of the existence of low self-confidence, lack of sexual knowledge of men, often can not well understand and deal with the problems that arise in sexual life, in the process of coitus psychological pressure, can not relax, thus inducing erection problems and impotence. If the woman is stronger at this time, do not understand and blame and complain, the man will be more lack of self-confidence, more prone to impotence. 3, age over 40 years old impotence is a common disease of adult men, and impotence and age have a relationship, the older the more people suffer from. The prevalence of impotence among men over the age of 40 is 40% to 50%. In other words, almost one out of every two men over the age of 40 has impotence. Although it does not mean that the older the impotence, but more than 40 years old impotence possibility and so on increase, this is an undeniable fact. 4, suffering from diabetes, hypertension, hyperlipidemia, etc. Impotence and arteriosclerosis, coronary heart disease, hypertension, etc. are related to vascular diseases, so these diseases often exist at the same time; if you get one of these diseases, then you get another disease is greatly increased. People with high blood pressure, for example, have an increased likelihood of impotence, which is 15% higher than normal. Diabetes is very easy to damage the function of blood vessels and nerves, causing arteriosclerosis and peripheral neuritis, which also includes the penile cavernous blood vessels and nerves related to penile erection, so people with diabetes are very easy to get impotence, the current statistics believe that diabetic patients get impotence accounted for more than 70%. People with high blood lipids are prone to atherosclerosis, so the risk of impotence will increase. The higher the total serum cholesterol and LDL, the lower the HDL, the greater the likelihood of impotence. It is important to note that current data suggests that dyslipidemia has become one of the most common causes of impotence. 5, hepatic and renal insufficiency The prevalence of impotence in patients with chronic renal insufficiency is more than 40%, and as high as 50%~75% in dialysis patients. The prevalence of impotence can be as high as 50%~70% in people with alcoholic cirrhosis, while in patients with non-alcoholic cirrhosis, impotence only accounts for about 25%. 6, the adverse effects of drugs on penile erection hardness of drugs include: treatment of prostate drugs (sometimes also used in the treatment of hair loss), such as finasteride, because of its anti-androgen effect, some people eat will have a bad erection; other drugs, such as anti-anxiety and depression drugs, sedatives. Taking antidepressants with poor erections may benefit from adjusting the medication to trazodone. Antihypertensives, because of their ability to lower blood pressure, reduce penile perfusion pressure, which can lead to impotence due to insufficient blood supply to the penile arteries. Adjustment of antihypertensive medications to adrenergic receptor antagonists, calcium channel blockers, or angiotensin-converting enzyme inhibitors may then be needed to make impotence better in some patients.