Infertility in men usually refers to the inability of sperm to unite successfully with eggs, thus rendering men infertile. Male infertility is only a generic term for a disease that includes a wide variety of diseases, such as azoospermia, oligospermia, impotence, and other diseases that belong to male infertility. There are many causes of male infertility, firstly, it is related to male reproductive organ abnormalities, some male testes have congenital abnormal development, including azoospermia, varicocele hypoplasia, XXY syndrome, male pseudohermaphroditism, etc. Abnormal testicular descent is also an important cause of male infertility, varicocele, androgenic target organ lesions, etc. can cause infertility. Secondly, male endocrine abnormalities are also an important cause of infertility. If men have endocrine abnormalities, it will cause a decrease in the level of androgens in the body leading to sexual dysfunction, such as decreased libido, erectile dysfunction, premature ejaculation, non-ejaculation and retrograde ejaculation. Infection is also a cause of male infertility, for example, mumps virus can cause orchitis, and in serious cases, permanent destruction and atrophy of the varicocele can lead to testicular failure, causing infertility. Male infertility is a very serious problem that can affect the relationship between the couple and most of all the absence of a baby, so you need to go to the hospital for examination and treatment in time.