What causes gums to swell and hurt
Painful swollen gums commonly come from plaque inflammation, infection, trauma, or an erupting tooth, and need assessment if persistent.
The short answer
Painful swollen gums can result from plaque-related gingivitis, a gum or tooth infection, food trapped under the gum, trauma, or inflammation around an erupting tooth. The location, duration, bleeding, and tooth symptoms help distinguish these causes.
What happens inside the gum when it swells?
Gum swelling is an increase in tissue fluid and inflammatory cells around the gingiva. Tenderness may come from irritated gum tissue, pressure from an impacted tooth, or infection in the pulp, root, or periodontal tissues.
How can you care for painful swollen gums today?
Brush gently with a soft brush, clean between the teeth, and rinse with warm water while arranging an examination. Do not puncture a swelling or place aspirin directly on the gum, because either can injure the tissue.
When does gum swelling need a dental examination?
Seek dental care when swelling lasts, returns, or is focused beside one tooth. Get urgent help for facial swelling, fever, difficulty swallowing or breathing, spreading redness, or inability to open the mouth normally.
What should your dentist check behind the swelling?
Ask whether the swelling is from gum inflammation, a cavity, a root infection, a wisdom tooth, or trapped debris. Ask whether probing, a vitality test, or a dental image is needed to identify the source.
Frequently asked questions
Can food stuck between teeth cause swelling?
Yes. Trapped food can irritate the papilla, the small gum peak between teeth, until it is removed and the area settles.
Does swollen gum always mean an abscess?
No. Gingivitis and mechanical irritation can swell without a pus-filled abscess, but a localized lump needs 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.