Gum swollen under tooth
Swelling under a tooth can come from gum inflammation, trapped debris, a periodontal pocket, or infection in the tooth or root.
The short answer
Swelling under a tooth can come from gum inflammation, trapped debris, a periodontal pocket, or an infection in the tooth or root tissues.
Where can a lump under a tooth develop?
The lump may be in the marginal gum, between teeth, or over the root tip. Its location, tenderness, colour, drainage, and relation to biting help distinguish irritated gum tissue from a dental abscess or a problem with an erupting tooth.
How does a dentist assess swelling under a tooth?
Rinse gently with warm water, brush the area with a soft brush, and clean between the teeth if possible. Do not puncture the swelling or apply caustic substances, because this can injure the mucosa and hide the progression of infection.
When should swelling under a tooth be examined?
A dentist checks the gum pocket, tooth mobility, decay, cracks, bite, and pulp response, then may take a radiograph. Care may involve removal of trapped material, periodontal debridement, a filling, root canal treatment, drainage, or extraction according to the cause.
What should you ask about swelling beneath a tooth?
Book an examination promptly if swelling lasts, enlarges, drains, or returns, or if the tooth is painful or sensitive. Seek emergency medical care for spreading facial swelling, fever with deterioration, or difficulty breathing or swallowing.
Frequently asked questions
Can a swollen gum settle by itself?
Minor irritation from trapped food may improve after gentle cleaning, but persistent or recurrent swelling needs assessment for gum disease, decay, or infection.
Does a bump always mean an abscess?
No. A bump can reflect irritation or gum tissue changes, but a painful or draining bump over a tooth can be a sign of infection.
Keep reading
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.