I'd call his ENT surgeon. There should be an answering service where he can be paged. Better to be safe than sorry. He's the one that did the surgery and he's the one that should answer any concerns you have. I work for a surgeon and it's not uncommon for people to call with concerns after surgery. Most just need to be reassured, but there are a few times when it is more important. The only way for us to know if there's a problem is when the patient or family member calls. Also, if you go to the ER, he'd likely be paged anyway, even if it's just to consult over the phone with the ER staff- better to go right to the source.