Angular cheilitis significantly impacts our daily eating habits; once affected, it often causes pain during meals. There are many factors behind the onset of angular cheilitis, primarily due to nutritional deficiencies, especially a lack of Vitamin B6. Therefore, we should avoid picky or poor eating habits and consume foods rich in vitamins to supplement deficiencies. Another cause is infection by bacteria or viruses. We need to enhance our immunity to prevent these pathogens from causing angular cheilitis. Additionally, irritants in the mouth, such as foreign bodies, can lead to angular cheilitis. When getting dental crowns or undergoing treatment, it is crucial to choose proper medical procedures to reduce irritation to the oral mucosa.