Male infertility can be caused by sexual dysfunction, varicocele, chromosomal abnormality, etc., which can be treated with medication or surgery in cooperation with the doctor. 1. Sexual dysfunction: after men suffer from sexual dysfunction, it will lead to the semen can not be sent into the female reproductive tract, causing infertility. Patients can take sildenafil, dapoxetine and other drugs as prescribed by the doctor. 2. Varicose veins: Varicose veins can cause the veins of the spermatic cord to be varicose like earthworms, which may cause the quality of semen to be affected, resulting in male infertility, which can be treated by surgery, such as high ligation of the spermatic cord veins. 3. Chromosomal abnormality: It belongs to a type of gender development abnormality. If the patient has chromosomal abnormality, it will easily lead to infertility. The disease is currently untreatable, and patients should consult their doctors in time for genetic counseling. To summarize, male infertility may also be caused by other reasons, it is recommended to go to the hospital to do the examination, according to the cause of timely treatment.