Stimulated: We sometimes use sour tasting items to stimulate salivary gland flow to evaluate blockages in salivary ducts. If you have a stone in the duct it can produce sudden swelling but a sensation like you describe is most likely just caused by the sudden stimulation of the gland.
Answered 4/29/2015
2.9k views
Not uncommon: Salivary glands, due to over production of saliva and pain is caused by the inability of the glands to discharge the saliva. See your PCP for consultation.
Answered 7/22/2016
2.9k views
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