What causes a small whitish blister on the frenulum of the tongue?
A picture would be helpful
A single white blister under the tongue can be a common occurrence and is usually harmless and transitory. It may be related to a mild injury in the tongue or to an allergic reaction. If, however, there are more of them and they become painful a diagnosis of aphthous ulcers should be considered. I would advise you see an ENT specialist if the blister persists or becomes painful or increases in number.
Ultimately, for a more accurate answer, I would need to see a picture to get a better idea of the type of blister.
I hope this helps. Take care.
Dr. Ornela Ademovi
General & Family Physician
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