What Is The Treatment For Swollen And Painful Penis?

My 10 y/o son got struck directly on his penis last nightby hard hit grounder baseball. His pain was immediate but he was able to walk a few minutes later with little discomfort. Gave him ice pack last night and both ice and tylenol this morning. He has much greater pain this morning, hurts to pee (no sign of any blood in urine), and some small readness and swelling around tip (where tip meets skin, he is cirmumsized). Unfortunately this is first time he was not wearing his cup because we were just playing around while watching another team play.