Ulcer-like formation just behind right tonsil

[dsionach]

I have had an ulcer-like formation (whiteish) just behind the right tonsil for nearly two weeks and today two small puss pimples appeared on the right tonsil, which is a little red. I don't have any fever and only have a very mild sore throat. I went to the GP today and he said he could not see the ulcer-like thing, only that my tonsil has a slight infection. He looked a fair bit with a light, but he examined my throat with my tongue out and diagnosed tonsilitis, suggesting that I may wish to have the tonsils removed if they are repeatedly infected. I discovered after returning from seeing him that it can only be seen when the tongue is in the mouth, which causes the tonsils to lift a little, revealing the formation. I don't wish to return to the GP without giving him some kind of reason to doubt his diagnosis and appearing to be a hypochondriac. A friend whose wife died of mouth cancer agrees that it is not the worse thing and suggests it could be a lymph node that has swollen up to fight the infection. The thing is that I've seen this before over the past three or four years, starting from when I stayed in a particularly polluted city in Asia and put it down to being run-down.

I have attached a photo, which shows the formation on the left of the uvula on the photograph, corresponding to the right side of my throat.

[dsionach]

The ***** is not a bad word - it means full of puss.

[dsionach]

The GP I saw today said the white swelling is "food packing", in which food has got trapped in a cavity behind the tonsil and has gone *****. He said it is common in people with tonsils and that gargling with warm water after food will help prevent it happening. Has anyone else experienced this? Are there any other treatments for it?