this is called a cryptic tonsils (tonsils with holes or crypts in them like the surface of the moon). cryptic tonsils can trap food particles and other debris. this debris can harden/calcify and turn into a tonsillith (tonsil stone). these stones can dislodge from time to time and startle the person who has them. they can also smell or taste bad. there are no specific treatmens for these holes other than a tonsillectomy of course. gargling with warm salt water after means can help keep these holes from accumulating debris. there is no relationship between cryptic tonsils and sinus infections they are two different conditions.
i am having a hard time swallowing it looked like there was a hole in one of my tonsils like an actual hole. but i also have a sinus infection.