Beginning today, my 16 month old nephew screams in apparent pain when anybody goes near his scrotum. There's no redness or swelling. I cannot palpate either teste, but his mother says she's felt them before. I also felt around for perhaps an inguinal hernia, I didn't feel anything. Should she be emergently worried? Also, he doesn't display any sort of discomfort when he's walking around or playing. She also says he's urinating normally.