There is a meatball inside the left testicle. It is recommended to go to the hospital for a detailed physical examination or to conduct relevant imaging examinations to further confirm the cause: First, normal epididymal tissue, the epididymis is attached to the rear of the testicle, soft in texture when touched, striped, with an inflated head end and tail end, and a vas deferens connected to the rear of the tail end, sometimes unintentionally touching the epididymal tissue, mistaking it for diseased tissue, and causing psychological Fear. It is recommended to go to the hospital for relevant examination to determine the specific cause by professional doctors. Normal epididymal tissues can have a special painful feeling when touched, but there is no self-conscious symptom without touching. Secondly, semen retention cysts are mostly located at the head end of the testes, and have a round texture when touched, similar to a round ball shape. Generally, there is no obvious pain, and an ultrasound examination of the scrotum is needed, and there is no swelling and pain usually. Thirdly, testicular tumor or benign nodule, which is attached to the testicle and causes surface protrusion, sometimes with unsmooth or painful sensation, requires CT examination of the testicle or testicular oncology index examination to further rule out whether it is testicular tumor.