Canker sores, also known as aphthous ulcers, are small, painful sores that develop inside the mouth. While they are common and usually heal on their own within a week or two, some sores persist or worsen over time. Knowing when to see a doctor can help prevent complications and identify underlying health issues.

Signs That Warrant Medical Attention

If you experience any of the following, it is advisable to consult a healthcare professional:

  • Your canker sores last longer than three weeks.
  • The sores are unusually large or painful.
  • There are multiple sores appearing at the same time.
  • They spread to other parts of your mouth or throat.
  • You notice bleeding, fever, or other signs of infection.
  • Oral sores are interfering with eating, drinking, or speaking.

Potential Underlying Causes

Persistent canker sores may be a symptom of underlying health conditions such as:

  • Vitamin deficiencies (e.g., B12, folate, iron)
  • Immune system disorders
  • Hormonal changes
  • Gastrointestinal diseases like Crohn's disease
  • Allergic reactions or sensitivities

Preventive Measures and When to Seek Help

To reduce the frequency and severity of canker sores:

  • Maintain good oral hygiene
  • Avoid spicy, acidic, or abrasive foods
  • Manage stress effectively
  • Eat a balanced diet rich in vitamins and minerals

If sores persist despite these measures or if you are unsure about their severity, consult a healthcare provider. They can diagnose underlying issues and recommend appropriate treatment options, which may include medication or lifestyle adjustments.