How should a gum ulcer be treated?

Gum Ulcer Treatment

Treatment of gum ulcers must be guided by accurate diagnosis first, as management depends entirely on the underlying cause—ranging from simple removal of local irritants for traumatic ulcers to systemic therapy for autoimmune or infectious etiologies.

Diagnostic Approach Before Treatment

The 2022 expert consensus guideline emphasizes that proper treatment cannot begin without identifying the ulcer type 1. The diagnostic algorithm should proceed as follows:

Initial Assessment

• Identify obvious traumatic causes: Look for sharp tooth edges, ill-fitting dentures, thermal burns, or chemical injury. If the ulcer location and shape correspond to a mechanical irritant, this is likely traumatic ulceration 1
• Assess ulcer characteristics:
  • Recurrent aphthous ulcers (RAU) appear as well-demarcated, oval/round ulcers with white or yellow pseudomembrane and surrounding erythematous halo 1
  • Tuberculosis ulcers are stellate with undermined edges 1
  • Duration matters: Any ulcer persisting >2 weeks or not responding to 1-2 weeks of treatment requires biopsy 1

Pre-Biopsy Workup (for non-healing ulcers)

Before proceeding to biopsy, obtain 1:

• Complete blood count (to detect anemia, leukemia, blood disorders)
• Coagulation studies and fasting glucose (exclude biopsy contraindications; hyperglycemia predisposes to fungal infections)
• HIV antibody and syphilis serology
• If bullous disease suspected: serum antibodies (Dsg1, Dsg3, BP180, BP230)

Treatment by Ulcer Type

Traumatic Ulceration

• Remove the causative irritant immediately (smooth sharp tooth edges, adjust dentures, eliminate chemical exposure)
• Ulcers typically heal within days once irritant is removed 1
• Supportive care during healing (see symptomatic management below)

Recurrent Aphthous Ulcers (RAU)

Primary goals: Pain relief, reduce ulcer duration, restore oral function 2

First-line topical therapy 2:

• Antimicrobial mouthwashes
• Topical corticosteroids (most effective for localized lesions)
• These achieve symptom control but don't alter recurrence rates

For refractory cases 2:

• Systemic medications if topical therapy fails
• Oral corticosteroids reserved for severe major RAU unresponsive to topical agents
• Levamisole shows variable efficacy in reducing frequency/duration

Necrotizing Ulcerative Gingivitis (NUG)

Diagnostic triad: Painful gums, bleeding, ulceration/necrosis of interdental papillae 3

Treatment combines 3:

• Mechanical debridement (tartar removal)
• Local antimicrobial agents
• Systemic antibiotics (targets anaerobic bacteria, particularly Bacteroides intermedius and Fusobacterium species)
• Healing expected within days with adequate treatment; untreated cases can progress to necrotizing ulcerative periodontitis or noma

mTOR Inhibitor-Associated Stomatitis (mIAS)

For patients on targeted cancer therapies 4:

Topical high-potency corticosteroids first-line:

• Dexamethasone mouth rinse (0.1 mg/mL) for multiple/difficult-to-reach ulcers
• Clobetasol gel/ointment (0.05%) for limited, accessible ulcers

If no resolution:

• Intralesional triamcinolone injection (weekly, total 28 mg) plus topical clobetasol

For highly symptomatic or recurrent ulcers:

• Systemic corticosteroids: High-dose pulse prednisone 30-60 mg (or 1 mg/kg) for 1 week, then taper over second week

Symptomatic Management (All Types)

Pain Control 4

Mild pain:

• Viscous lidocaine 2% mouthwash
• Coating agents
• Apply before eating if mouthwash causes pain

Moderate pain:

• Topical NSAID (amlexanox 5% oral paste)
• If NSAIDs not tolerated: acetaminophen plus immediate-release oral opioid or fast-acting fentanyl (50 μg nasal spray) for short-term relief before meals

Severe persistent pain:

• Consider transdermal or intranasal routes (oral administration may be compromised)

Oral Hygiene Support 4

• Bland rinses (saline or sodium bicarbonate)
• Increase frequency up to hourly if needed
• For oral dryness: sugar-free gum/candy, salivary substitutes, or sialogogues

Critical Pitfalls to Avoid

1. Never delay biopsy for ulcers >2 weeks duration or non-responsive to initial treatment—this is essential to rule out malignancy, autoimmune disease, or systemic conditions that could affect mortality 1

2. Don't assume all gum ulcers are benign aphthous ulcers—tuberculosis, syphilis, HIV-related lesions, and squamous cell carcinoma can present as oral ulcers 1, 5

3. Consider medication-induced ulcers in the differential—chronic Nicorette gum use, cinnamon-flavored products, and NSAIDs can all cause oral ulceration 6, 7

4. In immunocompromised patients or those with poor nutrition, maintain high suspicion for NUG and initiate aggressive treatment promptly to prevent progression 3