If you have been experiencing problems with a tooth, you may wonder, "Do I need a root canal?" Root canals, also known as endodontic therapy, are performed when the nerve or pulp of the tooth becomes infected and inflammed due to dental decay, a cracked or broken tooth or an injury to the tooth, according to the American Dental Association. During the procedure, a dentist uses a drill to remove both the nerve and pulp and seals up the tooth to protect against further damage. Only your dentist or a dental specialist called an endodontist, can determine whether a root canal will adequately treat your problem. Here are a few possible symptoms of the need for a root canal and some steps for dealing with them. General Possible Symptoms The most common symptom that may indicate the need for a root canal is tooth pain, according to the American Association of Endodontists. The intensity of the pain can range from mild to severe; it may lessen or intensify throughout the day, or ...