There are many reasons for low libido in men, and it is a normal physiological phenomenon that libido gradually decreases with age. Because the sexual function is under the control of the nervous and endocrine system to regulate a series of conditioned and unconditioned reflexes, with the participation of the reproductive system, motor system, respiratory system, circulatory system and other systems to complete, but also by the influence of psychological and other factors. Health conditions, psychological factors, endocrine factors, drugs and various diseases can cause low libido in men, summarized in the following aspects. 1, physical factors: overexertion, after a serious illness or long-term chronic disease and lead to extreme physical weakness, can lead to low libido or no libido. 2, the energy factor: in the brain workers such as intellectuals or cadres of institutions are most common. Due to too much tension, too much strain, resulting in a certain excitement foci in the central nervous system is too excited, can inhibit the sexual center, low libido. 3, psychological factors: too much worry, too much anger or too much fear, etc. can affect the psychological state caused by low libido. 4, mental pressure: the couple’s sexual life is not coordinated, or the male party because of temporary sexual dysfunction and the female party’s blame and ridicule, resulting in inferiority and self-blame psychology, and then mental pressure, fear of failure again, so as to try to suppress their sexual requirements, and over time lead to the loss of sexual desire. 5, lack of sexual knowledge: the couple lacks the necessary sexual knowledge and sexual skills, the woman does not pay attention to grooming, cleaning themselves, the lack of heterosexual stimulation and attraction, so that sex becomes a routine, and doubly boring, and eventually lead to loss of libido. 6, the couple’s feelings are not good: the lack of sexual communication, or for various reasons caused by the wife never get sexual satisfaction, causing the wife suffering from sexual apathy, sexual indifference, refusing to have sex. Over time, it may also occur that the husband’s impotence. 7, the lack of correct understanding of sex: with the increase in age, think that sex lost the meaning of fertility, no longer interested; or think that sex is improper behavior, thus creating an undue aversion to sex. 8, poor living environment: poor living environment, poor living conditions, lack of seclusion and security of sexual life, causing psychological overload on both husband and wife, thus making sexual life tasteless. 9, endocrine factors: testicular function decline, produce too little male hormone. Such as Creutzfeldt-Jakob syndrome, male post-menopause and adrenal gland disease, thyroid disease, etc. can cause male hypersexuality. 10, disease factors: physical weakness, excessive fatigue, chronic diseases, endocrine dysfunction, etc. can cause low libido. 11, drug influence: long-term use of sedatives, anti-hypertensive drugs (such as reserpine, colistin, propranolol), diuretics (anodyne) and antihistamines, anti-androgen drugs and estrogen drugs, etc., can make low libido. 12, other factors: all the factors that can cause impotence or premature ejaculation, such as chronic inflammation of the reproductive organs, etc., in causing premature ejaculation, impotence for a longer period of time after the failure to heal, can also further affect the libido, and no sexual intercourse requirements.