A member asked:

What causes a watery blister under the tongue?

A doctor has provided 1 answer

Salivary Gland: A translucent watery blister under the tongue is most likely a mucous retention cyst, mucocele, or ranula which occurs when the duct of a salivary gland becomes occluded. The gland continues to produce saliva and cannot empty into the mouth, resulting in a ballooning effect of the duct or gland depending on the location of the blockage.

Answered 10/4/2019

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