What is happening to my tonsil?

Hello,
It has been some weeks that my right tonsil is strange.

It is swollen.
One crypt is very swollen with white pus in it.
Some crypts located in tonsil's back-side are filled with white pus as
well.

It does not hurts at all, it's just a little bit sensitive.

I do not have problems to swallow or breath.

Do you have any clues?

.