Q. I have pain in the rigth root canal molar tooth on taking warm foods. Why?

Answered by
Dr. Himayoon Majeed Mir
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Nov 28, 2019

Hello doctor,

I got a root canal and crown several years ago in two molars, one on each side of my jaw. The crowns are metal with light porcelain on the outside. The teeth have felt fine ever since, until a few days ago. Now I feel pain in the right molar tooth whenever some warm food touches it. The pain takes a second or two to come, it is not instant on contact. Cold food or drinks cause no pain, neither does chewing. The gums around the crowned teeth are irritated, and look like they are possibly pulling down away from the teeth as I can see the dark metal underpart at the gum line. The tooth on the left side does not hurt at all aside from the irritated look of the gums around it. After doing some reading, I think a possibility is that the root canal did not get all the pulp in the right side tooth, and that is now infected again. I do not currently have dental or medical insurance and it may be a few months later I can see a dentist. What can I do in the meantime to take care of the tooth?

I also became aware that I grind and click my teeth a lot without realizing it, and possibly at night when I sleep. My front teeth all look worn down now. This is concerning me a lot. I looked into teeth guards for sleeping, but the ones I found in stores need to be heated and placed between teeth to shape them to my mouth, and with my current heat sensitivity I can not use them.



Welcome to

I have read your query and it is pretty much clear that the right molar with history of RCT (root canal treatment) is causing the pain. Now the causes of pain may be a re-infection or incomplete RCT, but there can be other causes as well. As you mentioned you have bruxism (teeth grinding), the tooth or in this case the RCT tooth is under continuous insult from the grinding habit. This may have also caused the injury to the surrounding tissues. A prosthetic crown or porcelain crown here if not in occlusion may also be another cause for the pain.

Now as you mentioned that you are having pain only on taking warm foods and liquid diet and the gums around the crown is receding (recession), it looks like you might be having tooth sensitivity in the nearby tooth due to the dentin exposure caused by recession. An x-ray of the tooth will make the things more clear as if a new RCT is required or you just need proper cleaning and fluoride toothpaste. If it is possible, do upload a picture of the tooth and also x-ray of the tooth.

Meanwhile, I would suggest you to use fluoride-containing toothpaste and ultrasoft toothbrush. Do not scrub, clean your teeth and gums gently. Maintain good oral health.

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
What causes toothache with hard bump in the gum?

Hi doctor, I have pain in my molar tooth on lower right side and under it is a hard bump in my gum ... The pain is only when I eat or touch bump or tooth ...   Read full

What causes toothache once the filling chipped off?

Hello doctor, I flossed by a tooth where a filling almost came out and my tooth and gum have been hurting all night ... Also have a tooth that is by this molar that...   Read full

Is root canal treatment advisable to cure badly decayed front teeth in a child?

.. antibiotic coverage and meanwhile get the culprit teeth extracted if it is definitely amongst the first four. These are milk teeth which will come at age of 6. Do not get them extracted together. The one or two causing severe infection should be e...   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

Monkeypox Virus - Symptoms, Diagnosis, Treatment, Complications, and Prevention
Monkeypox is a zoonotic viral disease. This virus got its name as it was first noticed in laboratory monkeys in the late...  Read more»
Tomato Fever - Causes, Symptoms, Diagnosis, Treatment, and Prevention
Tomato fever is an unidentified and fast-spreading type of viral infection seen in young children. Scroll down to know m...  Read more»
Histrionic Personality Disorder - Causes, Signs, Symptoms, Diagnosis and Treatment
Histrionic personality disorder causes variations in the thinking ability of a person. Read this article to know more.  Read more»

Ask your health query to a doctor online?

Ask a Dentist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.