Angular cheilitis, commonly known as cracked corners of the mouth, is relatively common in daily life and usually seen in children. It generally occurs on one or both sides of the corners of the mouth. The causes of the condition can vary, including nutritional deficiencies, candidal angular cheilitis, or bacterial angular cheilitis. It is recommended that patients experiencing this condition consult a hospital for diagnosis. Topical application of anti-inflammatory ointments can be very effective in local inflammation control and repair. Dietary adjustments should include eating bland foods and avoiding spicy or irritating foods. Maintaining a regular lifestyle without staying up late and developing good living habits are advised. Appropriate intake of vitamins or trace elements, and possibly oral antiviral medications, can also be considered.