Be careful not to get any food in the open hole, but if you start to experience swelling in the area of the extraction, then chances are that you have an infection. You should have gotten some penicillin from the dentist.
The first sign would be pain, if you have any pain go to your dentist and get it checked out. You could get a piece of food in the extraction site or you can get an infection.
Infections in your gums are generally accompanied by a strong pain. If you begin to experience pain that is clearly not just a simple toothache and does not go away, see your dentist. You might also notice unusual redness or whiteness in the gums.
Look out for red, irritated or inflammed gum tissues. If you have a bad taste in your mouth, it could be infection. If you see a "pimple" on the gums, this could be a drain for infection.
