What Causes Recurrent Mouth Ulcers?
Aphthous ulcers (canker sores) are a very common condition. Many patients are unclear about the underlying causes of their oral ulcers and do not know what triggers them. So, what causes recurrent oral ulcers?
Causes of Recurrent Oral Ulcers
The exact etiology of oral ulcers remains unclear; however, most cases are associated with psychological factors such as mental stress, anxiety, and poor sleep quality. Additionally, local irritants within the oral cavity—including residual tooth roots or crowns, ill-fitting dental prostheses, and dental calculus—can also contribute.

Trauma is another potential cause. For instance, accidentally biting the lip mucosa may lead to a break in the tissue, which can subsequently develop into an oral ulcer. Moreover, ulcers are highly sensitive to external stimuli, and even slight contact can provoke intense pain. Treatment is primarily symptomatic—common approaches include applying protective ulcer films or using topical sprays. Patients with recurrent oral ulcers may benefit from daily supplementation with vitamins or increased intake of vitamin-rich foods, such as pumpkin, cherries, and bananas.

The medications mentioned above are for reference only. Specific drug use should always be guided by a physician. If you experience any discomfort or abnormal symptoms, please seek prompt medical evaluation at a hospital and undergo appropriate management under the supervision of a qualified healthcare professional. We hope this information has been helpful to you!