What makes gums swell
Swollen gums are usually caused by local inflammation, but infection, trauma, medicines, and broader health conditions can also contribute.
The short answer
Gum swelling occurs when blood vessels widen and fluid and immune cells enter the gingival tissues. Plaque at the gum margin is a common trigger, but a trapped food fragment, dental abscess, erupting tooth, ill-fitting restoration, trauma, or medication can produce a local swelling.
Why does the location of gum swelling matter?
The location matters: swelling around one tooth may point to a local irritant or infection, while generalized enlargement can reflect plaque-related gingivitis, medication effects, or a broader condition. Redness, bleeding, tenderness, bad taste, fever, and tooth pain add useful clues.
How can you care for swollen gums until assessment?
Brush gently twice daily and clean between the teeth to remove plaque, unless doing so causes severe pain. Rinse with warm water, avoid squeezing a lump, and check for a sharp filling edge, food trap, or appliance rubbing the gum.
When should gum swelling be examined by a dentist?
Book a dental examination if swelling lasts, recurs, affects one tooth, or is associated with pain, pus, a bad taste, fever, a loose tooth, or facial swelling. Seek urgent care if swelling affects swallowing or breathing.
What should you ask about where the swelling starts?
Ask whether the swelling is in the gingiva, around the tooth root, or related to an erupting tooth. Ask whether an X-ray, gum measurement, drainage, restoration adjustment, or medicine review is needed.
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.