A root canal is a dental procedure used to treat infection or damage in the pulp of a tooth. The pulp contains nerves and blood vessels, and when it becomes infected, it can cause pain and swelling. During the procedure, a dentist removes the infected pulp, cleans the inside of the tooth, and seals it to prevent further issues. After a root canal, the tooth may need a crown to restore its strength and function. Many people fear this procedure, but it can relieve pain and save a tooth that might otherwise need to be extracted. Proper care can help maintain the tooth for many years.