Treatment for Recurrent Aphthous Stomatitis (RAS)

Initial Management Approach

The American College of Physicians recommends basic oral care with non-alcoholic mouthwashes containing sodium bicarbonate as foundational management for all patients with RAS 1
Maintaining good oral hygiene helps prevent secondary infections and reduces symptom severity in patients with RAS 1
For mild symptoms, 0.9% saline or sodium bicarbonate rinses can provide symptomatic relief in patients with RAS 1
Barrier preparations such as Gengigel mouth rinse/gel or Gelclair can help with pain control in patients with RAS 2

Sodium bicarbonate rinses 4-6 times daily can be used for mild RAS symptoms 1
Topical anesthetics such as viscous lidocaine 2% can be considered for pain management in mild RAS 1, 3
Anti-inflammatory oral rinses containing benzydamine hydrochloride can be used every 3 hours, particularly before eating, for mild RAS symptoms 3

Increasing the frequency of sodium bicarbonate mouthwash up to hourly if necessary can help manage moderate RAS symptoms 1
Topical high-potency corticosteroids, such as betamethasone sodium phosphate 0.5 mg dissolved in 10 mL water as a rinse-and-spit 1-4 times daily, can be applied for moderate RAS 2
Fluticasone propionate nasules diluted in 10 mL water twice daily can be used as an alternative topical corticosteroid for moderate RAS 2
Clobetasol 0.05% ointment mixed in 50% Orabase applied twice weekly to localized lesions can be used for moderate RAS symptoms 2

High-potency topical corticosteroids can be used as first-line therapy for highly symptomatic ulcers in severe or recalcitrant RAS 2
Intralesional triamcinolone injections (total dose 28 mg) in conjunction with topical clobetasol gel/ointment can be considered for severe or recalcitrant RAS 2
Systemic corticosteroids may be necessary for persistent severe cases, with a high-dose pulse 30-60 mg or 1 mg/kg oral prednisone/prednisolone for 1 week followed by tapering over the second week 1, 2

Tacrolimus 0.1% ointment applied twice daily for 4 weeks can be effective for recalcitrant RAS cases 2

It is essential to distinguish RAS from other conditions like herpes labialis, which requires antiviral therapy, according to the Journal of Clinical Virology 4, 5
Treating any concurrent candidal infection with nystatin oral suspension or miconazole oral gel is crucial in patients with RAS 2

Consuming soft, moist, non-irritating foods that are easy to chew and swallow can help manage RAS symptoms 1
Using sugarless chewing gum, candy, or salivary substitutes for oral dryness can provide relief in patients with RAS 1
Drinking plenty of water and using lip balm for dry lips can help manage RAS symptoms 1
Using ice chips or ice pops as needed to numb the mouth can provide temporary relief for patients with RAS 1

The American Academy of Otolaryngology-Head and Neck Surgery suggests considering PFAPA syndrome as a modifying factor that may favor more aggressive treatment for recurrent aphthous stomatitis 6
The American Heart Association recommends evaluating for Behçet's disease if a patient presents with the triad of uveitis, aphthous stomatitis, and genital ulcers 7

Brush teeth twice daily with a soft‑bristled toothbrush and mild fluoride toothpaste using the Bass technique to reduce mechanical irritation and promote healing. 8
Avoid known painful stimuli such as smoking, alcohol, citrus fruits, and hot or spicy foods, which can exacerbate ulcer formation. 8
Apply a lip balm or white petrolatum to the lips only short‑term (no longer than two weeks) to protect the vermilion border while preventing occlusion‑related complications. 8
Do not use chronic white petrolatum on the lips, as prolonged occlusion may lead to mucosal dehydration and increase the risk of secondary infection. 8

Intralesional triamcinolone injections (total dose ≈ 28 mg per week) combined with topical clobetasol 0.05 % gel/ointment are recommended for patients with persistent ulcers > 2 weeks, multiple large lesions, or significant functional impairment. 9
Systemic corticosteroid therapy (prednisone or prednisolone 30–60 mg daily, or 1 mg/kg) for one week followed by a taper over the second week is advised when severe disease does not respond to topical measures. 9