Among the patients I see with sexual function problems, there are few who have poor sexual desire. It seems that they are healthy couple, but they have no desire to have sex with each other. The lack of desire to have sex with each other also reduces the hardness of the erection. What is going on here? Now a brief analysis of some of the factors affecting sexual desire: 1, age: with men’s physical strength and energy, age every growing some, sexual desire will also decline a little, this is the natural law. Generally after 25 years old, the idea of sex will be lower than before, 40 to 50 years old after the performance is more obvious. But generally sexual desire will be maintained at a certain level and last for quite a long period of life. 2, fatigue: physical and mental fatigue will naturally affect the various desires of people. This factor is sometimes easy to be ignored, such as workload, often work late and sleep deprivation, residence and unit distance caused by running to and from work, the above factors cause physical overdraft, will naturally make the sexual desire to decline. At the same time, employment pressure and if the work is not high sense of achievement and other factors will also inhibit the desire from the mood. 3, emotional factors: people in a bad mood, sexual desire is easy to temporarily reduce, especially in extreme sadness, terror, indignation, sorrow, depression and despair and other bad, sexual desire will be significantly affected, and even can be completely lost. As the bad mood recedes, sexual desire will also be restored, but in general its recovery time is slower than the bad mood recedes. For example, family members have health or other problems, the relationship between the couple has obstacles, sexual desire is bound to be affected. 4, secondary to other sexual dysfunction: due to early poor erection or ejaculation or other problems, the patient will therefore intentionally or unintentionally avoid intercourse, so as not to affect their self-esteem, over time will also affect the sexual desire and even hate sex. The author has seen many patients, because of impotence and premature ejaculation problems and reduce the number of sexual life, slowly sexual desire is also affected. There are also more serious cases, the young man in just married because of a few attempts at sex did not succeed, since then they will intentionally avoid the same room, gradually reduce the idea of sex, the result of several years after marriage, the two still maintain the state of sexless marriage. 5, health status: only physically and mentally healthy people may maintain a normal sex drive for a long time. Some chronic diseases can significantly affect the male libido, such as hypertension, hyperlipidemia, diabetes, obesity, etc.. The health of the woman will also affect the sexual desire of the man. 6, obesity: nutrition is the material basis of sex life. Research results show that men’s protein and zinc and other important micronutrient deficiencies, can cause sexual dysfunction. Adequate, complete nutrition, especially more food rich in high-quality protein, multivitamins and zinc, can maintain the normal level of sexual function. However, it should also be noted that excess nutrition will cause obesity, and heavy obesity will lead to a reduction in the body androgen level followed by hypersexuality. 7, drugs: long-term or large quantities of certain drugs, affecting sexual desire and sexual function. For example, some anti-hypertensive drugs, drugs for the treatment of depression, drugs for the treatment of psychosis, sedative-hypnotic drugs, anti-androgen drugs, estrogen drugs and some anti-cancer drugs. A longer period of time after receiving radiotherapy can also lead to a reduced sex drive. 8, sensitivity to sexual stimulation decreased: the strength of male libido and the intensity of sensory stimulation related. The constant stimulation of sensory organs such as vision, smell, hearing and skin touch can stimulate a stronger sexual desire. But some of the men who have many years of married life will have elevated sensory stimulation threshold phenomenon, the conventional habit of sensory stimulation has been difficult to reach the point of sexual excitement, often feel unable to raise sexual interest. This decrease in libido is often relative, its own libido may not be a problem, when encountering new stronger sensory stimulation, libido may play normal. 9, environment: living in a crowded environment, not only will cause bad mood, and due to the lack of fresh air indoors, resulting in insufficient oxygen supply to the brain and affect sexual function, so that sexual desire is reduced. Especially several generations of people living in the same room, or with children sleeping in the same bed, will cause invisible pressure, easy to cause a decrease in libido. 10, other factors: (1) smoking and drinking: some people’s sexual desire decline with it, smoking can lead to erectile dysfunction, causing sexual disharmony and thus affect the sexual desire of both husband and wife. Therefore, quit smoking and alcohol can improve sexual dysfunction and improve sexual desire. (2) season and temperature: in the spring and autumn in the right temperature, most people’s libido will be stronger, especially in spring is known as the season of courtship, and hot and humid, sweaty summer and dry and cold winter, libido is often temporarily weakened.