Inflamed gum in back of mouth
Inflammation at the back of the mouth may come from plaque, a partially erupted wisdom tooth, trauma, or infection around a tooth.
The short answer
Tissue behind the last molar can swell when plaque, trapped food, a cheek bite, decay, or a partially erupted wisdom tooth irritates it.
What is the direct answer?
What does this question mean?
Rinse gently with warm salt water, brush reachable surfaces, and do not puncture the swelling or place aspirin or concentrated peroxide on it.
What can you do next?
Arrange prompt care for worsening pain, pus, foul taste, fever, facial swelling, limited opening, or difficulty swallowing.
When should you seek dental care?
Ask whether the cause is pericoronitis, gingivitis, decay, trauma, or an abscess, and whether cleaning, drainage, restoration, or extraction is needed.
What should you ask the dentist?
A gum flap can trap food around a wisdom tooth.
Frequently asked questions
No. Puncturing it can spread infection and injure tissue.
Why does a wisdom tooth make the back gum swell?