There are no obvious signs of male infertility, so it is recommended that patients go to the hospital to complete semen and other related examinations to confirm the diagnosis. Usually, we can pay attention to observe the male first sex sign and second sex sign, and pay attention to whether there are reproductive system diseases and other abnormal manifestations. 1. Male primary sexual characteristics: it can be seen whether the patient has delayed development of genitals, such as small size of testicles, testicular atrophy, etc. Any abnormality may lead to infertility. 2. Male secondary sexual characteristics: whether the male patient has a fat body, less muscle, less beard, short neck, laryngeal knot is not prominent, thin voice, etc. These characteristics suggest that the patient has low androgen. It may also affect male fertility. 3. Diseases of the reproductive system: such as impotence, premature ejaculation, orchitis, epididymitis, testicular nodules, epididymal nodules, weak spermatozoa, epididymis and other diseases, which may lead to erection problems, poor semen quality, and then cause infertility, it is recommended that the patient go to the hospital to improve the relevant examination and then treat the cause. If you have any discomfort, you should go to the hospital in time.