Inside your teeth are roots that contain dental pulp. The purpose of the dental pulp is to help form your teeth and you don't need that pulp anymore after your adult teeth have set in. This pulp can become inflamed or infected from bacteria getting inside your tooth and cause you discomfort and make your tooth sick.
This is exactly our specialty, to come in and clean out the pain causing bacteria. Early treatment of the inflamation can prevent your tooth from becoming infected. If you're experiencing any symptoms, no matter how minor, contact an endodontist to get a closer look.