I would get tonsil stones frequently while on 6MP. Now that I am off the drug, I no longer get tonsil stones and I haven't made any changes to my oral hygiene. Although there may or may not be a direct correlation with UC, it could certainly have to do with the meds that manage UC given the connection between tonsils and the immune and lymphatic systems.
What meds are you on? I've never gotten tonsil stones but when I'm on steroids or Antibiotics then I get Thrush pretty quickly and for me it is difficult to treat.
I wouldn't blame UC unless a doctor suspects it, this is probably a separate issue. Some healthy people get tonsil stones.
DX'd with Severe Pancolitis June 2005
Previous Meds: 5ASAs, Predisone, 6-MP. Remicade, Humira, Simponi, Cyclosporine -- Twice
3-step J-Pouch surgery:
Colectomy- October 2013
J-pouch Creation: March 2014
Take-Down: June 2014