If you’ve ever experienced a canker sore in your mouth, you know how incredibly painful they can be. They pop up out of the blue and immediately outstay their welcome. So what exactly are these mouth sores and why do they appear?

What Are Canker Sores?

Canker sores, or mouth ulcers, are small lesions that develop in your mouth or at the base of your gums. They result from bacteria, viruses, or fungi, which inflame the lining of the mouth and causes swelling, redness, and ulcer formation.

What Causes Canker Sores?

Unfortunately, there is no exact cause behind canker sores. However, there are certain conditions that increase your risk.

  • Stress.
  • Food allergies.
  • Vitamin deficiency — lack of vitamin B-12, zinc, folate, and iron.
  • Minor mouth injuries.
  • Brushing too hard.
  • Hormonal influxes.

When Do I See A Dentist?

If you develop any of the following, please call your dentist to set up an appointment immediately.

  • New canker sores before the old one heals.
  • A canker sore lasting more than 3 weeks.
  • Severe issues eating and drinking.
  • Mouth sores that extend to your lips.


If you’re looking for a superior pediatric dentist on Long Island to care for your little one’s teeth, look no further than Pediatric Dentistry of Suffolk County. For more questions or tips on how to keep your child’s teeth healthy, give us a call! We offer a caring and compassionate approach to pediatric dentistry, ensuring our patients are comfortable at all times.

To learn more or schedule an appointment, visit our website or give us a call.

Commack Office | 631-486-6364

Medford Office | 631-320-0880