Your tooth may continue to feel slightly different from your other teeth for some timeafter your root canal treatment has been completed. However, if you have severe pain or pressure that lasts more than a few days, contact your endodontist. Do not eat anything until the numbness in your mouth wears off.
How Long Does a Root Canal Take to Heal? Most people assume that a recently-treated tooth is going to take weeks or months to heal. The fact is that most people don't feel pain or notice any difference in how they feel 48 to 72 hours later, though some teeth may take longer.
However, the pain they feel is caused by an infection in the tooth, not by root canal treatment. A root canal is done to eliminate that pain. The root canal procedure itself is painless. A local anesthetic numbs the tooth and the surrounding area.