Basically, a root canal becomes necessary when the pulp of a tooth has become infected and needs to be removed. The signs and symptoms of infected tooth pulp may vary from person to person, but the most common are severe tooth pain while chewing or with pressure, prolonged sensitivity to hot or cold temperatures, discoloration or darkening of the tooth, swelling and tenderness in the surrounding gums, or pain specific to one tooth. It is important to discuss your concerns with your dentists so they are aware of any issues you are facing, and to receive peace of mind for yourself. Your dentist will be sure to uncover the root cause of your issues and provide an effective solution for relief.