It could be food debris collection in rt tonsil causing infection. Consult an ENT specialist f

You need to get a CT scan of your paranasal sinuses. Unless you are suffering from AIDS or any similar disease which causes severe immune compromised status, at your age primary tonsillitis is not possible! It is most probably secondarily infected...so the CT scan will reveal the primary focus of infection that needs to be cured to be finally rid of this infection!

In tonsillitis usually both tosils are affected, but rarely one side may be affected more. There are certain other conditions which should be excluded. Please consult with an experienced ENT surgeon.