What does this mean?
When an infection of dental origin passes through bone into soft tissue, the swelling becomes visible from outside. That means it is no longer confined inside the mouth; the direction and speed of spread are what matter.
Swelling rising towards the eye or descending into the neck carries a separate urgency. Difficulty swallowing, breathlessness and being unable to open the mouth are signs the airway is starting to be involved.
There are two usual dental causes of facial swelling; in both, treatment is directed at the source of the infection.
Likely causes
What helps at home?
- Do not apply heat to the swollen area; heat speeds the spread
- A cold compress from outside eases it but does not replace treatment
- Do not try to burst or drain the swelling yourself
- Swelling spreading under the eye or into the neck
- Difficulty swallowing or breathing: go to the nearest emergency department
- Fever, shivering or feeling generally unwell
- Being unable to open your mouth two fingers wide
Frequently asked questions
- The swelling went down; should I still go?
- Yes. A drop in swelling usually means the pus has drained, not that the source has healed. Untouched, it recurs.
- Is taking an antibiotic enough?
- No. An antibiotic slows the spread but does not reach the infected tissue. The source has to be cleaned.
This content is for general information and does not replace an in-person examination. Symptoms overlap between conditions, and a diagnosis can only be made clinically.