Why Do Mouth Ulcers Occur?

There are numerous causes of recurrent oral ulcers, and many patients experience repeated episodes—leaving them uncertain about the underlying reasons. So, what causes oral ulcers?

Causes of Oral Ulcers

Oral ulcers often arise from factors such as work-related stress and emotional irritability, particularly in individuals prone to “excess heat” (a concept in Traditional Chinese Medicine). This internal “heat” can manifest as oral ulcers and other bodily abnormalities. Some women develop oral ulcers during menstruation, primarily due to peak progesterone levels and declining estrogen levels at this time. Oral ulcers are considered a sign of internal “fire-toxin,” especially excessive stomach fire. Overeating regularly may cause food stagnation in the stomach, imposing excessive strain on gastric function and generating stomach fire; severe stomach fire can trigger frequent recurrence of oral ulcers. Poor oral hygiene is another contributing factor: inadequate or irregular toothbrushing allows bacteria to accumulate in the mouth, increasing susceptibility to oral ulcers.

Home remedies for treating oral ulcers: Apply granulated sugar directly onto the ulcerated area three times daily. Sugar promotes tissue healing and accelerates recovery of oral ulcers, though its effect is relatively slow and requires patience. Strong tea contains catechins, which possess mild antibacterial properties, helping to reduce inflammation, inhibit bacterial growth, and support wound healing—though its therapeutic effect is also gradual.

Therefore, maintaining good oral hygiene is essential: brush your teeth thoroughly every day, rinse your mouth before and after meals, and follow a light, easily digestible diet. Additionally, drink plenty of water to help eliminate internal “excess heat” and promote overall health. We hope this article has been helpful to you!