- Tooth sensitivity that lingers, especially to heat or cold
- Sharp pain when chewing or biting
- Pimples on your gums
- Chipped or cracked teeth
- Swollen or painful gums
- Deep decay or darkened gums
A root canal is performed in a dental office. When you arrive for your appointment, a technician will escort you to a treatment room, help you get situated in a chair, and place a bib around your neck to protect your clothes from stains.