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Pain Under Tongue After Root Canal: Causes and What to Do
Submandibular/submental pain after root canal is uncommon but possible.
Potential Causes
- Residual inflammation: Periapical tissues irritated by instrumentation/irrigation
- Nerve irritation: Lingual nerve proximity to mandibular molars/premolars
- Infection/abscess: Persistent or new bacterial involvement
- Referred pain: From the treated tooth or adjacent structures
- Injection site trauma: Lingual nerve block or infiltration
Action
Contact your endodontist or dentist promptly. They will clinically and radiographically evaluate for missed canals, fracture, overfill, or infection. Treatment may include antibiotics, re-treatment, or referral for nerve assessment.
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