What causes mouth ulcers before each menstrual period?

Recurrent oral ulcers before each menstrual period may be caused by multiple factors: 1. Before menstruation, women's immune systems may be weakened, making the body more susceptible to bacterial, viral, or other pathogenic invasions, which can lead to oral ulcers. 2. Hormonal changes in the body before menstruation, particularly the decrease in estrogen levels and the increase in progesterone levels, may affect the health of the oral mucosa and contribute to the development of oral ulcers. 3. If one's diet is irregular and frequently includes spicy, greasy, or irritating foods, this may also increase the risk of developing oral ulcers before menstruation. To alleviate and prevent oral ulcers, women are advised to maintain good oral hygiene, eat a balanced diet, avoid excessive fatigue, and maintain a positive mindset before menstruation. If symptoms persist or worsen, prompt medical attention is recommended.