Probably a virus.: Virus infection, usually herpes virus can cause blistering in the mouth that can evolve to mouth ulcers. With a bad episode, lymph nodes in the neck will enlarge. Mouth ulcers can also occur as a reaction to medication, or as a manifestation of autoimmune disease. If they persist, or interfere with eating, see a doctor for help.
Answered 4/9/2020
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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