28/09/2026
Most oral sores are benign and heal spontaneously within two weeks. What matters is not simply the presence of a sore, but how it progresses over time.
Sores known as canker sores (aphthae) are usually painful, have well-defined borders, and gradually become smaller. Cheek biting, a sharp or broken filling edge, an ill-fitting denture, periods of stress, and certain vitamin deficiencies can contribute to their development.
In contrast, lesions that persist for more than two weeks, continue to grow, are painless, or have a firm base should be evaluated by a healthcare professional. Sores that repeatedly occur in the same area may also indicate an ongoing mechanical cause.
In such cases, the recommended approach is not simply to treat the sore itself, but to identify and address the underlying cause.