Published on May 26, 2018

Mouth ulcer


One or more painful sores on inner lips, gums, tongue, roof of the mouth, or throat that may interfere with eating, such as a canker sore.

Self-care

Let ice chips melt over the ulcers, or rinse your mouth with salt water or baking soda and water to lessen pain. Avoid spicy, acidic, or abrasive foods.

When to seek immediate medical care

See a doctor immediately if:

  • High fever
  • Very difficult to eat or drink

When to make a doctor's appointment

Make an appointment to see a doctor if:

  • Very large ulcers
  • Lasting two weeks or more
  • Pain that doesn't respond to self-treatment
  • Recurring sores