A tooth with an infection will start to decay and the roots can become infected. When this happens, pus or other decayed debris may build up near your gum line as well as in between the root canal of a tooth's narrow opening. The pain is usually what alerts you that there might be something wrong with one of these teeth so it’s important to keep your dental appointments!
Other symptoms may include swelling that can spread to the face, neck, and head, as well as bone loss around the tip of the root. A tooth can also begin to exhibit drainage with the surrounding gum becoming inflamed. A hole in a tooth is possible, leading to infected gums or skin further downstream from the site of teeth decay.