Tobacco. The nicotine in tobacco can affect blood circulation in the penis, resulting in a slower or inadequate erectile response, which in severe cases can lead to erectile dysfunction, or impotence, as it is often called. Alcohol. The amount of the androgen testosterone in the blood decreases after heavy drinking. On the one hand, due to the fact that exactly what directly prevents the testicles from producing testosterone, and on the other hand, due to the fact that under the secondary influence of alcohol, the liver speeds up the processing of testosterone, much of which is broken down and converted into other substances. Insufficient testosterone concentration in the blood naturally affects sexual performance. Moreover, alcohol also leads to sperm deformities and reduced sperm count, causing male infertility. Stress. Long-term high-intensity stress environment will make men depressed, androgen water products decline, interest, let alone have a good “bed” performance. Lack of exercise. This will lead to a decline in the function of the vascular system, blood vessels lose elasticity, insufficient tissue perfusion, erection will also be affected to a certain extent. Improper diet, due to various reasons to consume too much too greasy, acidic things, or even junk food, leading to high blood fat, high blood pressure, affecting the penile capillary blood congestion. Prostate disease and other factors, including long-term long time consumption of laptop computers (especially like to put it on the lap), using cell phones to make phone calls, long-term use of medicines (such as cardiovascular drugs, gastrointestinal drugs, antidepressants, excitatory anesthesia, anti-tumor drugs, prostate drugs, etc.). Psychological factors. Psychological factors can also seriously affect male sexual function. Sexual worries, sexual trauma, interpersonal conflicts, psychological depression, chronic diseases such as diabetes, etc. may lead to male sexual dysfunction.