Many people who suffer from canker sores, also known as aphthous ulcers, wonder if their toothpaste might be a contributing factor. While the exact cause of canker sores is not fully understood, certain ingredients in toothpaste have been linked to the development or worsening of these painful mouth ulcers.

What Are Canker Sores?

Canker sores are small, shallow ulcers that develop inside the mouth, on the cheeks, lips, or tongue. They typically cause discomfort, especially when eating or drinking. Although they usually heal on their own within one to two weeks, recurring sores can be bothersome and may indicate sensitivity to certain substances.

Ingredients in Toothpaste That May Trigger Canker Sores

  • Sodium Lauryl Sulfate (SLS): This foaming agent is commonly used in many toothpastes. Some studies suggest that SLS can irritate the soft tissues in the mouth and may increase the risk of canker sores.
  • Flavoring Agents: Strong mint or other artificial flavors can sometimes cause irritation in sensitive individuals.
  • Preservatives and Sweeteners: Certain preservatives and artificial sweeteners may also contribute to oral sensitivity.

What You Can Do

If you suspect your toothpaste is triggering canker sores, consider switching to a toothpaste free of SLS and artificial flavors. Look for products labeled as "sensitive" or "for oral ulcers." Additionally, maintaining good oral hygiene and avoiding spicy or acidic foods can help reduce irritation.

Consult a Healthcare Professional

If canker sores persist or worsen, it is important to consult a dentist or healthcare provider. They can help identify underlying causes and recommend appropriate treatments or preventive measures.