My Son Was In A Motorbike Carash He' Was 17

My son was in a motorbike carash he' was 17 back in feb 2015. He had an autora stent also legs graft but was then released in april back home on 3 morning tabs and warfin of an evening!.5/6 alternative days! He has recently had a small swelling under his right arm pit and tenderness also a small pain at the back of his shoulder blade lower. Shall I take him to emergency hospital