I have a root canal done 4 years ago on my maxillary but it does not have a crown and right not im having really really bad pain on it what am i to do?

Check w dentist: Return to the dentist that did the root canal for you. Evaluate for split tooth, abscess, periodontal problem, problem w adjacent teeth. Don't delay.

Still infected: Your tooth is probably infected or is reinfected. A crown is usually necessary to seal the top of the tooth to prevent bacteria from infecting the tooth. The fact that your tooth does or doesn't have pain is irrelevant as you can have an infection without any pain. Get it checked out. You may need to extract the tooth to get rid of an infection that is in the bone surrounding your tooth.

You have been: Lucky 4 years is a long time for a root canaled tooth to go without a crown if indicated. Don't wait on symptoms. Try to get it done before a fracture.