Hello .I understand your concern.dental pains are very commonly not pin point pain so it's quite possible that the tooth you are pointing towards is not the cause of pain.for a correct diagnosis the x ray findings have to be correlated with the clinical / visual findings .so having a look at the x ray image will not give the correct diagnosis. But if there is difficulty in mouth opening then it suggests that there is infection which highly likely can be due to the upper wisdom tooth impinging on the lower retro molar soft tissue area( i.e . The gums behind the lower 2nd molar teeth) or it can be due to bone loss and gingival / periodontal pocket formation around the last right lower molar teeth.

Hello Mam. I understand your concern. As per given history of sudden onset of pain , unable to chew , restricted mouth opening with gum swelling. As i try to correlate with the given OPG . There seems class 2 cavity in between last tooth and last but one tooth. But clinical correlation is much needed along with OPG. It might be irreversible pulpitis which is causing sharp sudden pain. The complain of gum swelling might be due to upper molar biting the gums of lower arch which indicates restricted mouth opening and difficulty in chewing. Again needs clinical assessment.

Hello, It seems that, erupting 3rd molar of upper jaw is causing traumatic bite causing pain in the lower jaw of the same side needs extraction i.e removal by the Dentist. also Lower jaw is having referred pain from pocket formed distal to the last molar i.e 2nd molar which might be causing food lodgement,so needs evaluation by the Dentist and do the treatment accordingly.

Based on the symptoms described—severe pain, swelling behind the last tooth, difficulty in chewing, and reduced mouth opening—there appears to be an active infection in the lower posterior region. This may be related to a decayed tooth requiring root canal treatment or an associated wisdom tooth infection. An OPG alone may not always reveal the complete extent of infection; a clinical examination and additional investigations are often required for an accurate diagnosis. If your dentist has advised RCT after evaluation, the recommendation is likely based on both the clinical findings and radiographic assessment. Regarding medications, it would not be appropriate to suggest any specific medicines without knowing the patient’s complete medical history, current medications, allergies, and overall health status. Please consult your treating dentist for a prescription tailored to his condition. Do not delay treatment, and seek immediate care if swelling increases, fever develops, or mouth opening becomes more restricted.

Hello Go for root canal treatment followed by crown