Back of mouth gum swollen
Swelling at the back of the mouth often involves the gum around a wisdom tooth, but decay, food impaction, trauma, or a gum infection can produce.
The short answer
Swelling at the back of the mouth often involves the gum around a wisdom tooth, but decay, food impaction, trauma, or a gum infection can produce similar swelling.
Why can a wisdom-tooth gum flap become swollen?
Partly erupted third molars can leave a gum flap over the tooth. Bacteria and trapped food beneath the flap may cause pericoronitis, with tenderness, redness, bad taste, or pain when opening the mouth.
How can you care for swollen gum while awaiting review?
Clean gently with a small soft brush and rinse with lukewarm salt water while arranging an examination. The dentist may flush the pocket, inspect the second and third molars, take an X-ray, and treat infection, decay, or the tooth position.
When does back-gum swelling require urgent care?
Obtain urgent care for fever, facial or neck swelling, pus, difficulty swallowing or breathing, or limited mouth opening. Even without those signs, recurring swelling should be assessed because the adjacent molar can be damaged.
Can swollen gum at the back heal without dental treatment?
Can swollen gum at the back heal by itself? Mild irritation may settle, but repeated or worsening swelling can signal disease that requires treatment.
Frequently asked questions
Can swollen gum at the back heal by itself?
Mild irritation may settle, but repeated or worsening swelling can signal disease that requires treatment.
What if symptoms continue?
Obtain urgent care for fever, facial or neck swelling, pus, difficulty swallowing or breathing, or limited mouth opening. Even without those signs, recurring swelling should be assessed because the adjacent molar can be damaged.
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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.