Why do the gums behind my back teeth feel swollen?
Swelling behind a back tooth can come from a wisdom tooth, trapped food, gum inflammation, trauma, or infection around a nearby tooth.
What can swelling behind a back tooth indicate?
The rear gum may cover a partly erupted third molar, or a nearby molar may have plaque, decay, or a periodontal pocket. Trauma, an ulcer, and infection can feel similar.
How can I clean the swollen rear gum gently?
Rinse gently with warm salt water, clean carefully with a small soft brush, and prevent food packing there. Do not cut the gum, squeeze it, or force a tooth to move.
When should swelling behind a back tooth be examined?
Arrange prompt care for persistent or recurrent swelling, drainage, bad taste, limited opening, or fever. Neck or facial spread, breathing difficulty, or swallowing difficulty is urgent.
Could a wisdom tooth or abscess be causing the swelling?
Ask whether a wisdom tooth, gum pocket, ulcer, or abscess is responsible and whether an X-ray or treatment is needed.
Frequently asked questions
What is the most likely cause?
The rear gum may cover a partly erupted third molar, or a nearby molar may have plaque, decay, or a periodontal pocket. Trauma, an ulcer, and infection can feel similar.
Can it improve without treatment?
Some irritation settles when its trigger is removed, but persistent, recurrent, painful, or swollen symptoms need an examination.
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Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.

