Discovering a lump under your tongue can be alarming—understandably triggering concerns about what might be causing this unexpected swelling. At Tooronga Family Dentistry, Dr. Kaufman frequently addresses patient concerns about lumps appearing in the floor of the mouth. “Many times my patients are concerned about lumps appearing under their tongue.” The good news? Most lumps have benign explanations—but professional examination is essential because since the tongue is surrounded by several anatomical structures, there are many possible sources for the lump. Understanding the major categories of lumps helps Glen Iris patients recognize when immediate evaluation is needed versus when monitoring may be appropriate.
While this guide covers the major reasons for lumps under the tongue, it does not replace the need to have an examination by a dentist—only professional evaluation can definitively diagnose what you’re experiencing.
The Anatomy: Why This Area Is Complex
Multiple structures in small space:
The floor of the mouth contains:
✓ Mandible (lower jawbone) ✓ Sublingual salivary glands (under tongue) ✓ Submandibular salivary glands (below jaw angle) ✓ Salivary ducts (tubes draining saliva into mouth) ✓ Blood vessels and nerves ✓ Lymph nodes ✓ Muscles (tongue, floor of mouth) ✓ Connective tissue
Any of these structures can develop abnormalities—creating the lump you feel.
The Six Major Categories of Lumps Under Tongue
Dr. Kaufman’s classification:
1. Bone-Related: Exostoses or Torus
Benign bone overgrowth:
At times new bone is formed on the mandible, creating palpable hard lumps.
What Are Exostoses/Tori?
Characteristics:
✓ Bony protrusions from mandible (lower jaw) ✓ Feel like round, small or large hard lumps ✓ Usually grow on both sides of jaw (bilateral—symmetric) ✓ Smooth surface (covered by normal tissue) ✓ Non-painful (unless traumatized) ✓ Slow-growing or stable (present for years)
Specific Types:
Torus mandibularis:
- Most common location: lingual surface (tongue-side) of mandible near premolars
- Often bilateral (both sides)
- Hard, bony feel
- Can be single or multiple protrusions
Exostoses:
- Bony outgrowths anywhere on jaw
- May be unilateral or bilateral
- Various sizes
Why They Form:
Contributing factors:
⚠ Genetic predisposition (runs in families) ⚠ Grinding/clenching (parafunctional forces stimulating bone formation) ⚠ Dietary factors (some evidence linking calcium-rich diets) ⚠ Age (more common with advancing age)
Glen Iris patients often don’t notice tori until dentist points them out—they develop so gradually awareness comes late.
Clinical Significance:
These exostoses are benign lesions of little clinical significance, meaning:
✓ Not cancerous (no malignant potential) ✓ Don’t require treatment (unless causing functional problems) ✓ Not progressive disease (stable, predictable)
However:
They need to be regularly inspected because:
✓ Baseline documentation (tracking any changes) ✓ Traumatic ulceration possible (sharp edges rubbing tongue) ✓ Denture interference (if patient eventually needs dentures—tori may require removal) ✓ Differential diagnosis (ensuring lump is actually torus, not something else)
When Treatment Needed:
Rare indications for removal:
⚠ Interferes with denture fit ⚠ Speech difficulties ⚠ Chronic ulceration from trauma ⚠ Patient distress (cosmetic concerns—rare)
2. Salivary Gland Swelling: Ranula or Mucocele
Blocked salivary ducts:
Saliva is formed inside small and large glands, but when the tube that drains saliva into the mouth gets blocked, it starts to pool and cause swelling.
What Are Ranulas?
Characteristics:
✓ Cystic swelling from sublingual salivary gland ✓ Floor of mouth location (under tongue—often one side) ✓ Soft to touch (fluid-filled—distinctly different from hard bony torus) ✓ Bluish translucent appearance (when large—resembles frog’s underbelly, hence name “ranula”) ✓ May vanish if pushed on (fluid temporarily disperses) ✓ Re-appears after a while (fluid reaccumulates)
What Are Mucoceles?
Similar mechanism, different glands:
✓ Minor salivary gland involvement (hundreds throughout mouth) ✓ Can occur anywhere (lips, cheeks, floor of mouth) ✓ Trauma-induced often (biting lip/cheek damages duct) ✓ Soft, dome-shaped swelling ✓ Clear or bluish (fluid-filled)
The Mechanism:
How they form:
- Salivary duct damaged (trauma, stone, infection)
- Saliva cannot drain normally
- Saliva pools in surrounding tissues
- Cyst-like structure forms (pseudocyst—not true cyst)
- Swelling develops gradually or suddenly
The fluctuation:
These swellings may vanish if pushed on or saliva is drained but re-appear—characteristic feature distinguishing them from solid tumors or bony growths.
Treatment:
These lesions usually need treatment or removal:
✓ Observation rarely sufficient (tend to recur, enlarge) ✓ Surgical excision (removing cyst and affected salivary gland) ✓ Marsupialization (creating permanent opening for drainage—larger ranulas) ✓ Sclerotherapy (injecting medication causing cyst to scar closed—newer technique)
Glen Iris patients with persistent or enlarging ranulas/mucoceles should seek treatment—spontaneous resolution uncommon.
3. Connective Tissue-Related: Traumatic Fibroma
Chronic irritation response:
Traumatic fibroma is an area where lining of tongue has become thick, usually due to rubbing against a sharp edge.
What Is Traumatic Fibroma?
Characteristics:
✓ Firm, smooth lump (not hard like bone, not soft like cyst) ✓ Same color as surrounding tissue (pink/normal—not red or white) ✓ Related to chronic irritation (sharp tooth, rough filling, denture clasp) ✓ Slowly developing (forms over weeks to months) ✓ Painless usually (unless actively traumatized)
The Formation Process:
Healing gone wrong:
This causes accumulation of connective tissue at site of chronic irritation:
- Repeated trauma (rubbing, biting, friction)
- Healing response activated (body attempting repair)
- Excessive collagen produced (scar tissue forms)
- Lump develops from accumulated connective tissue
- Persists even after irritation removed (established fibrous mass)
Common Irritation Sources:
What causes chronic rubbing:
⚠ Sharp/broken tooth edge ⚠ Rough filling or crown margin ⚠ Poorly fitting denture (clasp rubbing) ⚠ Cheek/tongue biting habit ⚠ Orthodontic appliances (brackets, wires)
Treatment:
It is important to remove the cause of these lesions:
Two-step approach:
- Eliminate irritation source
- Smooth sharp tooth edge
- Replace rough filling
- Adjust denture
- Address biting habit
- Remove fibroma if necessary
- Surgical excision (simple procedure)
- Biopsy (confirming diagnosis—ruling out other pathology)
Important: Simply removing fibroma without addressing cause often leads to recurrence—irritation persists, new fibroma forms.
4. Infection or Inflammation: Dental Abscess Origin
Spreading infection:
An infection or inflammation originating from a tooth with an abscess, a salivary gland, or the bone can create swelling under the tongue.
Infection Sources:
Dental Abscess:
⚠ Tooth root infection (from deep decay or failed root canal) ⚠ Bacteria spread through bone ⚠ Pus accumulates in soft tissues under tongue ⚠ Swelling develops (often painful, tender)
Salivary Gland Infection (Sialadenitis):
⚠ Bacterial infection of submandibular or sublingual gland ⚠ Obstructed duct (stone, debris) ⚠ Swelling, pain especially when eating (saliva production increases) ⚠ Purulent drainage sometimes (pus from duct opening)
Bone Infection (Osteomyelitis):
⚠ Infection within jawbone ⚠ Spread to surrounding soft tissues ⚠ Severe pain, swelling ⚠ Systemic symptoms (fever, malaise)
Ludwig’s Angina: The Dangerous Progression
Life-threatening complication:
The infection from these areas can spread and cause swelling under the tongue. This can lead to a more severe form called “Ludwig’s angina”.
What Is Ludwig’s Angina?
Characteristics:
🚨 Bilateral floor of mouth infection (both sides) 🚨 Rapid progression (hours to days) 🚨 Massive swelling (tongue pushed upward/backward) 🚨 Airway compromise (swelling can block breathing—MEDICAL EMERGENCY) 🚨 Difficulty swallowing (“hot potato” voice) 🚨 Fever, malaise (systemic toxicity)
Medical emergency:
Ludwig’s angina requires:
- Immediate hospitalization (ICU often)
- Airway management (intubation or tracheostomy may be necessary)
- IV antibiotics (high-dose, broad-spectrum)
- Surgical drainage (releasing pus)
- Source control (extracting infected tooth)
Glen Iris patients with rapidly enlarging floor-of-mouth swelling, breathing difficulty, or high fever need emergency medical attention—call 000.
Treatment:
The treatment is to remove the source of infection, which will lead to disappearance of swelling:
✓ Tooth extraction (if dental abscess) ✓ Root canal (if tooth salvageable) ✓ Antibiotics (systemic—oral or IV depending on severity) ✓ Incision and drainage (releasing pus) ✓ Stone removal (if salivary stone causing obstruction)
Once infection source eliminated, swelling resolves over days to weeks.
5. Cyst Formation
Fluid-filled sacs:
There are cysts that can form under the tongue with the more common one being a lymphoepithelial cyst which develops from entrapped salivary glands.
What Are Cysts?
Definition:
✓ Closed sac with distinct membrane ✓ Fluid or semi-solid contents ✓ Slow growth (enlarge gradually) ✓ Benign (not cancerous—though require removal)
Lymphoepithelial Cyst:
Most common floor-of-mouth cyst:
✓ Develops from entrapped salivary tissue (developmental anomaly) ✓ Yellowish appearance often (keratin contents) ✓ Small (usually <1cm) ✓ Soft, movable (not attached to underlying structures) ✓ Painless (unless infected)
Other Cyst Types:
Additional possibilities:
✓ Dermoid/epidermoid cysts (developmental—contain skin elements) ✓ Thyroglossal duct cyst (midline developmental cyst) ✓ Retention cysts (salivary—similar to mucocele but true cyst wall)
Natural History:
Why removal necessary:
Usually cysts will need to be removed, since they tend to increase in size over time:
⚠ Progressive enlargement (eventually cause functional problems) ⚠ Infection risk (cyst contents can become infected) ⚠ Diagnostic certainty (histology confirms cyst type) ⚠ Symptom relief (removing source of swelling)
Treatment:
✓ Surgical excision (removing entire cyst with lining) ✓ Biopsy (pathologist examines tissue—confirming diagnosis) ✓ Recurrence rare if completely removed
6. Benign or Malignant Tumors
Neoplastic growths:
The different tissues around the tongue can give rise to tumors leading to swelling.
The Complexity:
It is not possible to list here all the different tumors or their treatment—dozens of tumor types can occur in oral cavity, each with specific characteristics and treatment protocols.
Tumor Categories:
Benign tumors:
✓ Lipoma (fat tissue tumor—soft, movable) ✓ Neurofibroma (nerve tissue tumor) ✓ Hemangioma (blood vessel tumor—red/purple) ✓ Papilloma (epithelial tumor—warty appearance) ✓ Schwannoma (nerve sheath tumor)
Malignant tumors:
🚨 Squamous cell carcinoma (most common oral cancer) 🚨 Adenocarcinoma (salivary gland cancer) 🚨 Lymphoma (lymphatic system cancer) 🚨 Sarcomas (connective tissue cancers—rare) 🚨 Metastatic tumors (cancers spread from elsewhere)
Why Immediate Evaluation Critical:
But it is very important to have them examined as soon as possible and monitored on a regular basis:
✓ Early cancer detection improves survival dramatically ✓ Benign tumors easier to remove when small ✓ Diagnostic certainty (only biopsy distinguishes benign from malignant) ✓ Treatment planning (determining appropriate therapy) ✓ Baseline documentation (tracking changes over time)
Red Flags for Malignancy:
Concerning features:
🚨 Rapid growth (weeks rather than months/years) 🚨 Ulceration (non-healing sore on/near lump) 🚨 Firm, fixed to underlying structures (not movable) 🚨 Irregular borders (not smooth, round lump) 🚨 Associated symptoms (numbness, pain, bleeding) 🚨 Risk factors present (tobacco use, heavy alcohol, HPV)
Glen Iris patients with any concerning features need urgent evaluation—delay can impact prognosis.
Diagnosis and Evaluation Process
Dr. Kaufman’s comprehensive approach:
Step 1: Clinical Examination
✓ Visual inspection (color, surface characteristics) ✓ Palpation (hard vs. soft, mobile vs. fixed, tender vs. painless) ✓ Size measurement (baseline for monitoring changes) ✓ Location documentation (precise anatomical position) ✓ Associated findings (nearby teeth condition, lymph nodes)
Step 2: Patient History
✓ Duration (how long present, rate of growth) ✓ Symptoms (pain, bleeding, functional problems) ✓ Trauma history (injury, biting, sharp teeth) ✓ Medical history (conditions affecting differential diagnosis) ✓ Risk factors (tobacco, alcohol, family history)
Step 3: Imaging (When Indicated)
✓ Dental X-rays (evaluating teeth, bone) ✓ Panoramic radiograph (comprehensive jaw view) ✓ Ultrasound (evaluating salivary glands, distinguishing solid vs. cystic) ✓ CT or MRI (detailed imaging for complex cases, tumor staging)
Step 4: Biopsy (When Appropriate)
✓ Incisional biopsy (removing sample for analysis—larger lesions) ✓ Excisional biopsy (removing entire lesion—smaller lumps) ✓ Fine needle aspiration (analyzing cyst fluid—certain cases)
Histopathology (microscopic examination by pathologist) provides definitive diagnosis.
When to Seek Immediate Evaluation
Don’t delay if:
🚨 Rapidly enlarging lump (noticeable growth over days/weeks) 🚨 Breathing or swallowing difficulty (potential airway compromise) 🚨 Severe pain or fever (infection) 🚨 Bleeding or ulceration (possible malignancy) 🚨 Numbness (nerve involvement) 🚨 Firm, fixed lump (concerning for malignancy) 🚨 Any lump present >2 weeks without obvious cause
The Importance of Professional Examination
Self-diagnosis insufficient:
While understanding possible causes helps, it is important to have any swelling under tongue examined because:
✓ Accurate diagnosis requires clinical expertise ✓ Serious conditions (infection, cancer) need prompt treatment ✓ Benign lesions may still require management ✓ Baseline documentation enables monitoring ✓ Peace of mind (knowing what you’re dealing with)
Please contact us to have an examination—don’t assume “it’s probably nothing” when professional evaluation is readily available.
Expert Oral Examination in Glen Iris
Dr. Kaufman provides comprehensive evaluation of oral lumps and swellings:
Our diagnostic services include:
✓ Thorough clinical examination (visual and palpation assessment) ✓ Detailed patient history (identifying contributing factors) ✓ Appropriate imaging (X-rays, referral for advanced imaging when needed) ✓ Biopsy when indicated (definitive diagnosis) ✓ Treatment of benign lesions (fibromas, ranulas, tori when necessary) ✓ Management of infections (antibiotics, drainage, source removal) ✓ Specialist referrals (oral surgeons, ENT, oncologists when appropriate) ✓ Ongoing monitoring (tracking lesions over time)
Schedule your examination:
- Phone: 9822 7006
- Services: Oral lesion diagnosis, lump evaluation, biopsy, comprehensive oral examination
- Location: Serving Glen Iris, Malvern, Ashburton, Camberwell, and surrounding Melbourne communities
For more information about tongue-related conditions, explore additional resources on our website or during your consultation.
If you’ve discovered a lump under your tongue, regardless of size or symptoms, Call or book online Tooronga Family Dentistry on (03) 9822 7006 to schedule an examination.
Early evaluation provides peace of mind for benign lesions and potentially life-saving early detection for serious conditions.
Don’t ignore lumps under your tongue. Get answers—and appropriate treatment—today.