Infertility generally has no obvious symptoms. There are many causes of infertility, such as varicocele, ejaculation, bilateral cryptorchidism and other disorders. Patients usually have no obvious symptoms, and some of them may have symptoms such as enlarged scrotum, ejaculation, and absence of testicles in the scrotum. 1. Varicocele:The cause and pathogenesis of varicocele are not clear, and it is considered to be due to congenital and acquired factors. Most of the patients are asymptomatic, but some of them may experience enlargement of the affected scrotum, vague pain and swelling, etc. Varicocele can lead to infertility. 2. Inejaculation:Inejaculation is mainly due to emotional problems, fatigue and other factors. The main symptoms of patients are that they can not complete ejaculation in the vagina but can complete sexual intercourse and other symptoms, due to the lack of ejaculation, so the patients will have infertility. 3. Bilateral cryptorchidism: If bilateral cryptorchidism is not treated in time, it will also lead to infertility. When bilateral cryptorchidism is present, it can be found that the testicles are absent in the scrotum of both sides. Infertility can also be caused by other diseases such as sexual dysfunction, and it is likely that there is no obvious disease, the patient should consult a doctor in time, and follow the doctor’s instructions for treatment.