If a cavity goes untreated, the decay process will eventually make its way into the nerve of the tooth. This may happen over a long period of time, and it can often go unnoticed by the patient until an acute infection develops.  Symptoms associated with an acute nerve infection include severe pain, throbbing and possible swelling of the gums and face. A root canal is typically done to save the infected tooth, avoiding the need for extraction.  In the past, many people were scared to hear the words root canal and the procedure was often associated with pain.  Fortunately, dental care is much more comfortable today than it was 20 years ago!  There have been many advancements in the delivery of root canals so that the procedure can be done with minimal discomfort to the patient. Numbing medication is always used before a root canal is started. The doctors at Delaware Smile Center pride themselves in their gentle techniques and make it their priority to ensure all their patients are comfortable.