So I just had a back tooth removed Monday and it's Thursday. I had to go back to the dentist to get some fillings today and told my dentist about it. I was afraid I had dry socket. He said it was normal, not to fret if there isn't severe pain or throbbing pain. He gave a look over a said food gets trapper in the hole and can't get out so it's best you gargle lightly at first and the after a few days you can use mouthwash to gargle to dislodge the food.