My Son Was Shut In A Sliding Glass Door At

My son was shut in a sliding glass door at the e.r this evening he was trying to escape my other sons room, with the m.a. he has swelling from his temple down to his jaw/chin. He fell asleep within 15 30 mins as we drove him. He just woke up, very whining and rubbing his ear and crying. He's two. It swelled instantly. Very concerned as he's a very happy child after a good rest.