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  1. Canker sore in throat: Pictures, symptoms, causes, and more

  2. Canker Sore on Tonsil: Symptoms, Causes, Treatment, Home …

  3. Canker sore - Symptoms and causes - Mayo Clinic

  4. Canker Sore on Tonsil: Causes, Symptoms, and Treatment

  5. Canker Sores: Causes, Symptoms, Treatments, and Remedies

  6. Mayo Clinic Q and A: Canker sores often go away on their own, …

  7. Canker Sore (Aphthous Ulcer): What It Is, Causes & Treatment

  8. Canker sore - Diagnosis and treatment - Mayo Clinic

  9. Recurrent Aphthous Stomatitis - The Merck Manuals

  10. Types of Canker Sores, Symptoms, Causes & Treatment - Verywell …