Hello sir.. pain may be due to so many reasons...It may be due to decayed teeth or due to wisdom teeth eruption or if the teeth is already having any filling then may be due to secondary caries because of improper or broken filling..or if the teeth is recently root canal treated and having crown check for high points or re infection of the root canal treated teeth..First and foremost x-ray has too be taken to rule out the cause .. If there is decayed teeth based on extent of caries get it treated by root canal treatment or simple filling.. If it is due to broken filling then do refilling or root canal treatment depends on extent of secondary caries... If the pain is due to high points in crowns of recently root canal treated teeth then do it corrected.. If the pain is In root canal treated teeth then do re root canal of the tooth...If the pain is due to wisdom teeth then it needs surgical removal followed by analgesics and antibiotics

Hello It seems ....u need bite correction Pls bite n check....both sides tht means both molars r touching simultaneously or not If left side is touching first thn....u need to go for bite correction (side which is touching first is creating too much pressure causing inflammation n pain or sensitivity) If u hv had done root canal previously thn get OPG done to check everything is fine If u hv cavity or broken tooth thn hurry up...get it restored

Pain could be because of decayed tooth, loose filling, or crack in the tooth. Pain can also be because of any gum problem.

Pain on left side while biting food is because of decayed tooth .Go to near by dentist and had a check up.If it is deeply carious..it will go for root canal.