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(also 
461)
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Consider excess stress, tobacco, marijuana and spicy foods (may aggravate).
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Explanation and reassurance—a self-limiting condition
No treatment if asymptomatic
Cepacaine gargles, 10 mL tds, if tender
If persistent and troublesome, low-dose inhaled glucocorticoid (e.g. beclomethasone 50 mcg tds) (don’t rinse after use)