Scrotal subcutaneous cysts are mainly considered to be related to pathological factors such as sebaceous cysts, orchitis, spermatic cord syringomyelia, testicular cancer and so on. 1. Sebaceous cysts: the relatively abundant hair follicles in the scrotum, coupled with excessive daily sweating and untimely cleaning, can cause local sebaceous cysts, manifesting as the symptoms of scrotal subcutaneous cysts, which can be accompanied by itching and pain. 2. Orchitis: mainly related to unclean sex and other factors, can cause local inflammation of the testicles, inflammation stimulation can cause scrotal subcutaneous cysts, can also be accompanied by testicular pain and other symptoms. 3. Seminal cord syringomyelia: it can be related to congenital factors, infection, trauma, etc. The localized accumulation of fluid can cause localized scrotal subcutaneous cysts, which can gradually increase in size, and in serious cases, it can cause testicular atrophy, which will have an impact on fertility. 4. Testicular Cancer: Testicular cancer can cause localized lump in testis, which is mistaken as scrotal subcutaneous cyst, the lump is hard and its volume can increase gradually, accompanied by local redness, swelling and other symptoms. In case of scrotal subcutaneous cysts, it is recommended to go to the hospital in time to find out the cause of the cysts and actively cooperate with the doctor for treatment so as to avoid delaying the condition.