What Are Causes of Blisters in the Mouth? - MedicineNet
https://www.medicinenet.com/what_are_causes_of_blisters_in_the_mouth/article.htm
Dec 18, 2020 · The following are different types of mouth blisters: Canker sores . Canker sores, also known as mouth ulcers, usually appear inside the lips, but they can also appear on the tongue, cheeks, and gums.They are usually under a half-inch long, are white or yellowish, and are oval-shaped, often with a red ring around them and slightly raised.
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