<s>[INST] I had new filling of all my molars, both sides, 3 weeks ago.  Since then Ive been experiencing a lot of pain, sometimes around one specific molar, other times all along the mouth, with high sensitivity to temperature. When I went back to my dentist he said it was either because of loss of dental enamel due to the cleaning or that I may need a root canal.  He made a composite around the molar that hurt me most, pain somewhat got better that day, but it always comes back. [/INST] Hi. Can understand your concern. As per your complaint some level of sensitivity after filling of teeth is normal, and it subsides after 3 to 4 days. But in case of pain it is a matter of concern. Pain occurs if the cavity made to clean off the infection of tooth and retain the filling material is too deep that it approximated the pulp (which is the central portion of the tooth containing the nerves and blood vessels) causing inflammation of the pulp leading to severe pain and at times swelling. I would suggest you to consult back to your dentist and get an IOP AR (x-ray) of the tooth in pain and get evaluated. If it has approximated the pulp you will have to get the filling removed under local anesthesia and get root canal treatment done followed by painkillers and antibiotics. If any of the other tooth is also paining in which filling was done same checkup and treatment can be carried out depending on the condition of tooth whether it can be saved or needs extraction. Hoping you get well soon. Thanks and regards. Chat Doctor.  </s>