Touching a sliding lump on the epididymis, consider epididymitis, epididymal tuberculosis, epididymal cyst and other factors. 1. Epididymitis: for young and middle-aged men who are sexually active, the epididymis may be swollen and painful due to bacterial infection, and even the epididymis on the affected side will increase in size and harden, with hard nodules that can be touched, therefore, touching a sliding lump on the epididymis can not be ruled out to be related to epididymitis. 2. Epididymal tuberculosis: Epididymis belongs to the place of storing and discharging sperms, when tuberculosis bacillus invades into the epididymis caused by epididymal tuberculosis, there may be epididymal slow enlargement of the hard nodule, and the patient will feel a sliding bump on the epididymis, and the fluid will flow out after it breaks. 3. Epididymal cyst: adolescent males may have epididymal cyst due to obstruction of the vas deferens, chronic infection or local trauma, etc. The main manifestation is a sliding lump felt on the epididymis, most of which is accompanied by mild pain and discomfort in the scrotum. In the case of patients can not determine the cause by themselves, it is recommended to go to the hospital urology department, with the doctor to improve the relevant examination, to determine the cause before treatment.