A patient is diagnosed with recurrent aphthous stomatitis. All of the following are appropriate management options EXCEPT one. Which is the EXCEPTION?

Correct answer: C. Excisional biopsy

• A. Chlorhexidine mouthwash reduces the bacterial component and may reduce ulcer duration and recurrence frequency.
• B. Low-level laser therapy (LLLT) has evidence for reducing pain and accelerating healing of aphthous ulcers.
• C. CORRECT. Excisional biopsy is NOT indicated for aphthous ulcers. Aphthous stomatitis is a clinical diagnosis; biopsy is reserved for ulcers that are atypical, persistent (>3 weeks), or suspicious for malignancy. Performing excisional biopsy on a known aphthous ulcer is unnecessary and potentially harmful.
• D. Topical corticosteroids (triamcinolone, fluocinonide) are first-line treatment for aphthous ulcers to reduce inflammation and speed healing.