My nephew got hurt in the scrotum area by a ball while playing and has swelling which is coming down. On consulting a doctor, he said this would have been an already existing issue (hydrocele) and said it would require surgery. The scan also showed mild hydrocele. Another doctor said this would resolve on its own as it was due to the injury but the former said it definitely needs surgery even if the swelling seems to come down as it might be due to the moving of the fluid up and down. He never indicated any pain before the injury. My question is whether this fluid might be due to the injury or would it be an already existing problem?