One of the more mysterious sources of canker sores is emotional stress. While doctors are unsure about why exactly stress precipitates canker sores, there seems to be a strong link. One theory is that stress or anxiety causes people to bite their cheeks out of nervousness, resulting in minor abrasions. Another is that stress results in fatigue and a weakened immune system, leaving the body more susceptible to attacks from bacteria.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.