Bump in mouth behind bottom teeth
A bump behind the lower front teeth may be normal anatomy, a blocked salivary duct, irritation, or a dental infection needing examination.
What could cause a bump behind the lower front teeth?
A bump behind the lower front teeth may be normal anatomy, a blocked salivary duct, irritation, or a dental infection needing examination.
What structures can form a bump behind lower teeth?
The inner gum can contain firm bony prominences, including a normal lingual mandibular ridge, while the floor of the mouth contains salivary ducts and glands. A new, tender, ulcerated, growing, or one-sided lump has a different clinical significance from a long-standing smooth bump.
How should you avoid irritating the area further?
Do not squeeze, cut, or repeatedly press the area. Check it gently in good light, avoid sharp foods, keep brushing and cleaning between teeth, and note its size, colour, tenderness, and duration.
When does this lower-mouth lump need examination?
Arrange a dental examination for a persistent or changing lump, bleeding, numbness, an ulcer that does not heal, or tooth pain beside it. Urgent care is needed for rapidly spreading swelling, fever, or difficulty breathing or swallowing.
What should the dentist check behind the teeth?
Ask whether the shape is normal bone or soft tissue, whether a tooth or salivary duct is involved, and whether an examination, dental X-ray, or referral is needed.
Frequently asked questions
Can a normal bone feel like a lump?
Yes. Some people have firm bony contours on the tongue side of the lower jaw, but a dentist must identify an unfamiliar finding.
Could a lower tooth cause the swelling?
Yes. Decay, gum infection, or an erupting tooth can create local swelling and may cause pain or drainage.
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.