Back gum inflamed
Inflammation behind a back tooth often comes from plaque, trapped food, or a partly erupted wisdom tooth, but infection also needs consideration.
The short answer
An inflamed back gum is commonly caused by plaque, trapped food, a partly erupted wisdom tooth, or local trauma, but persistent swelling can indicate infection or gum disease.

What is the direct answer?
What does this question mean?
The tissue behind a molar can form a flap around a partially erupted third molar, creating a pocket where plaque and food collect. Inflammation may also begin beside a cavity, rough filling, gum pocket, or tooth that rubs the cheek.
What can you do next?
Clean the back tooth gently with a soft brush and use floss or an interdental brush where it fits without force. Rinse with lukewarm water after meals, avoid picking the tissue, and choose softer foods until it settles.
When should you seek dental care?
Arrange an examination if the inflammation lasts, returns, bleeds, or is accompanied by pain, pus, bad taste, fever, or limited mouth opening. Facial swelling or difficulty swallowing or breathing needs urgent care.
What should you ask the dentist?
Ask whether the tissue is inflamed around a wisdom tooth, affected by decay, or showing a gum pocket, and whether an X-ray is needed. Ask whether cleaning, a filling, gum treatment, or wisdom-tooth treatment will address the source.
Frequently asked questions
Can an erupting wisdom tooth inflame the gum?
Yes. A partially erupted wisdom tooth can leave a gum flap that traps plaque and food, causing inflammation around it.
Will rinsing cure the problem?
A gentle rinse may remove loose debris, but recurring inflammation needs examination and treatment of its dental source.
