Today, a Mr. Li came to the male clinic, complaining of poor erectile function. Mr. Li is 37 years old, still relatively healthy, no history of disease, does not smoke, and drinks a small amount of alcohol. Mr. Li told us that he had a low libido in recent months, poor erection, some difficulty in completing sexual life, feeling that when he was young he would have an involuntary erection when he saw women wearing revealing clothes, but now he can’t get an erection even when he watches pornography, and his erection is not firm in sexual life, his lover and himself are not satisfied, and he is very distressed. For Mr. Wang to encounter this problem, we think it is necessary to popularize the knowledge of male erection. Penile erection is actually a neurovascular response in which external stimuli act on the penis through two nerve conduction channels, causing an increase in blood flow into the penis and a decrease in outflow and an increase in pressure in the cavernous body to induce an erection. The specific mechanism is as follows: under the stimulation of audiovisual, olfactory and tactile and/or hallucinatory sensations, the central nervous system sends out sexual impulses, which are transmitted to and from the penis via the sacral medullary center and peripheral nerves (psychosomatic erection), or by stimulating the external genitalia, the impulses cause parasympathetic excitation of the penis via the penile sacral medullary reflex arc (reflex erection), resulting in relaxation of the smooth muscles of the penile cavernous arteries and the penile cavernous sinuses, and increased blood perfusion in the penile corpus cavernosum and decreased venous return. When the blood pressure in the cavernous body of the penis rises to a level almost equal to the blood pressure in the arteries of the body, a firm erection is produced. Penile erections are usually divided into the two categories mentioned above, namely psychosomatic erections and reflex erections. Psycho-psychological erection is caused by stimulation of the brain from various sensory organs such as sight, sound, smell and touch or thought and imagination, this kind of erection occurs in the waking state, watching pornography is visual stimulation, and the way and method of stimulation will increase with age. Reflex erection, on the other hand, is caused by stimulation from the external genitalia and/or internal organs, and this erection can occur in the waking state or sometimes in sleep. The two reflexes can occur synergistically or independently. It is well known that age is an important indicator of male sexual function. According to statistics, the male libido is generally at its peak at the age of 18-25, and penile erection is also at its best at this time, with the increase in age, androgen reduction, nerve and skin response is slow, poor blood circulation in the sex organs, life stress, psychological aesthetic fatigue (such as African men, frequent sex) and so on make alone rely on mental psychological erection often does not work, at this time often need to combine Stronger external genital stimulation is needed to obtain a better erection. Therefore, for Mr. Li such patients our advice is: 1, to develop good habits, quit smoking and drinking, to maintain good sleep, appropriate self-reduction of stress, to maintain a good mood; 2, to change the time and place of sex fixed, to obtain a certain sense of freshness, thereby reducing aesthetic fatigue; 3, sex with the lover more communication, more caress, not only with the help of fatigue of vision, but also with the help of auditory, olfactory (such as the lover’s body coated with their favorite perfume), etc., through the caress to improve tactile stimulation, thereby improving erection; 4, go to the regular hospital as early as possible, and under the guidance of the doctor reasonable use of drugs to obtain a satisfactory sex life.