My 5 yr old son has swollen post auricular swelling (20mm) that is tender. He has had this swelling before but not as large. Although he has not appered to be sick he has been tired & lethargic. Do you think I should get it checked out immediately or see how it goes for a few days? Besides suplimenting his diet is there any external massage orlymphatic draining that could assist the process or should I let it follow its natural corse.