Epididymal head cysts do not usually affect fertility. Epididymal head cysts are mainly due to the accumulation of fluid produced in the head of the epididymis, which has not been fully absorbed to form a soft, rounded swelling, causing chronic inflammation. In general, if the cyst does not compress the epididymis or vas deferens, it will not affect sperm discharge and will not affect fertility. Epididymal head cysts usually do not have any clinical symptoms of manifestation, may appear in the root of the scrotum, pain, swelling sensation and so on. If the number of cysts in the epididymis increases or becomes bigger in a short period of time, the multiple cysts may compress the epididymis or the vas deferens, affecting the sperm delivery, which requires the patient to go to the hospital for ultrasound, physical examination, etc. to make a clear diagnosis, and under the guidance of the doctor for treatment.