Angular cheilitis is generally more common in the dry seasons of autumn and winter, because the skin around the lips is quite delicate. During the dry air of autumn and winter, the lips cannot withstand prolonged irritation, leading to dryness, peeling, and even bleeding of the lips. It can also occur in some patients who have long-term malnutrition, insufficient intake of vitamins, and some trace elements, leading to inflammation and erosion at the corners of the mouth, with no specific underlying causes identified. It is recommended that patients focus on regulating their diet and maintaining a healthy lifestyle. Drinking more water, eating fresh vegetables and fruits, avoiding staying up late, and developing good living habits are advisable. Taking certain vitamins and trace elements as needed, and applying anti-inflammatory ointment to the affected areas can help with inflammation and repair.