The gum behind my last tooth is swollen
Swelling behind a last molar can come from a partly erupted wisdom tooth, trapped food, trauma, or infection.
The short answer
Swelling behind the last molar can come from inflammation around a partly erupted wisdom tooth, trapped food, trauma, or an infection that needs examination.
What is the direct answer?
What does this question mean?
A gum flap over a partly erupted third molar can trap plaque and food. A sharp opposing tooth, cheek injury, or abscess can create similar swelling.
What can you do next?
Rinse gently with warm salt water, clean with a small soft brush, and choose soft foods temporarily. Do not probe under the gum or place aspirin on it.
When should you seek dental care?
Seek prompt care for persistent or recurring swelling, and urgent care for fever, facial or neck swelling, difficulty swallowing, or difficulty breathing.
What should you ask the dentist?
Ask whether a wisdom tooth is involved, whether imaging is needed, and whether cleaning, flap treatment, extraction, or another procedure addresses the cause.
Frequently asked questions
Can symptoms alone identify the cause?
They suggest possibilities, but an examination and sometimes imaging establish the cause.
What treatment is usually considered?
Treatment is chosen after the dentist identifies the cause and the affected tissues.