Thank you for all the information.
As he has started antibiotics, the infection will resolve.
Warm saline gargle can be done, it will be soothing.
1/4 to 1/2 teaspoon of salt needs to be dissolved in an 8-ounce of warm water.
Antiseptic mouth wash like Listerine can be used.
Sometimes a long course of antibiotic can be required.
I think he should be checked by doctor again to decide whether he will need a extended treatment schedule.
I hope this information helps.
My goal is to provide you with excellent service today. If there’s anything else I can do, please let me know.
If you are satisfied, please rate my answer as good or excellent.
f you want to click poor or bad service, please stop & feel free to reply & ask till you are satisfied.
I will be happy to assist, if you need any clarification. I hope to work with you again soon!