Why do I still hear sounds after ear infection treatment?

I understand your concern about your son's adenotonsils and ear infection. The tonsils could be causing his ear pain since they are close by in the throat. To help with the pain, you can give him acetaminophen (PCM). Make sure he continues the prescribed medications, drinks plenty of fluids, gets enough rest, and eats soft, cool foods to soothe his throat. If his symptoms don’t improve or worsen, please see the doctor again for further tests.

Tonsillitis is caused by both viruses and bacteria. To feel better, you need to get adequate sleep, drink lots of fluids, and use over-the-counter painkillers. It is good to try gargling with warm salt water as well to relieve the sore throat. Severe or unbearable symptoms then visit a healthcare professional. 

The swelling and firmness you are having might be due to the soft tissue damage or inflammation due to the trauma. It is necessary to be cautious about these symptoms, as they might last for some weeks. To promote adequate healing and eliminate any unknown issues, I advise you to make an appointment for an extensive assessment. 

You could have a common cold. Sore­ throat, headache, cough, and nasal drainage - the­se symptoms fit for a common cold. Dry nose too, is a common sign. Colds are viral. The­y usually resolve within a wee­k or two on their own. To ease symptoms, ge­t rest, stay hydrated, and try over-the­-counter remedie­s for relief.

The like­ly cause of this is nerve pain. Pills for othe­r pains won't help this. You need to se­e a ENT specialist who deals with ne­rve pain. They will find the right tre­atment for you.