Root canal treatment (also referred to as root canal therapy or endodontic therapy) is made necessary when an untreated cavity reaches all the way to this pulp. Treatment may also be needed when deep restorations or trauma to a tooth cause nerve damage. Once the pulp becomes infected, it can begin to eat away at the surrounding bone (this is known as an abscess). If the pulp is infected, not only is it painful but it will require treatment as it cannot heal on its own. Symptoms that indicate the pulp has become infected may include sensitivity to hot/cold or sweets, pain, swelling, pain to biting or pressure, and a bad taste in the mouth. However, sometimes no symptoms are apparent and you may be unaware of any problem until a checkup.