
Be very careful if it comes out in your mouth, you are infected with…See more below
Common Causes of Mouth Blisters 1. Canker Sores (Aphthous Ulcers) 2. Cold Sores (Herpes Simplex Virus) 3. Friction Blisters or Burns 4. Mucocele 5. Hand, Foot, and Mouth Disease Less Common but Concerning Causes 1. Pemphigus Vulgaris 2. Oral Lichen Planus 3. Oral Cancer