What does it mean when your back gum is swollen
A swollen back gum may surround an erupting wisdom tooth, trapped food, gum infection or another local dental problem.
The short answer
A swollen back gum may be caused by an erupting wisdom tooth, trapped food, inflamed gum tissue or infection around a tooth. The exact cause depends on the location, duration, tenderness, drainage and whether a tooth is partly covered by gum.
Why can gum cover and irritate a wisdom tooth?
At the very back of the mouth, a flap of gum can trap food and bacteria over a partially erupted wisdom tooth. Swelling can also reflect gingivitis, a periodontal pocket, a cavity in the back tooth, or an abscess that has spread into nearby gum tissue.
How can you gently clean a swollen back gum?
Gently brush the area with a small-headed toothbrush and rinse with warm salt water, taking care not to injure the tissue. Do not squeeze the swelling or place aspirin on the gum; a dentist may irrigate the area, treat decay or infection, or assess whether the wisdom tooth needs removal.
When does a swollen back gum need dental care?
Book dental care if swelling lasts, returns, bleeds, tastes unpleasant or makes chewing painful. Seek urgent help if you develop facial swelling, fever, difficulty opening the mouth, swallowing or breathing.
What should you ask about swelling near a wisdom tooth?
Ask which tooth or tissue is causing the swelling and whether an examination or dental X-ray is needed. Ask how any trapped area will be cleaned and whether treatment is required for the wisdom tooth, gum pocket, decay or abscess.
Frequently asked questions
Can a wisdom tooth cause swelling without severe pain?
Yes. A partially erupted wisdom tooth can cause local inflammation before pain becomes strong.
Should I pop a gum swelling?
No. Puncturing or squeezing it can injure tissue and does not treat the dental cause.
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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.