The main reason for persistent chapped and cracked lips is dehydration or a lack of certain vitamins and minerals. This phenomenon is usually related to a decrease in the skin's ability to retain moisture.

Human skin is composed of the epidermis, dermis, and subcutaneous tissue, with the epidermis being the outermost layer, primarily responsible for preventing moisture loss. When the body is dehydrated or lacks nutrients such as vitamins A, B2, B6, iron, and zinc, the skin's ability to retain moisture decreases, leading to dryness, peeling, and even cracking. The oral mucosa is thinner than the skin and more susceptible to external environmental influences, such as cold, dry climates, and unhealthy lifestyle habits like smoking and alcohol consumption, all of which can exacerbate this condition.

Maintaining adequate hydration is key to preventing and alleviating chapped lips in daily life. It's recommended to drink at least eight glasses of water a day, while also increasing your intake of foods rich in vitamins and minerals, such as fresh fruits, vegetables, and nuts. Avoid prolonged exposure to dry or cold environments, use lip balm to protect your lips, and avoid licking your lips, as saliva evaporation will draw away more moisture, making your lips even drier.

[Life Tips:]
1. Ensure adequate water intake every day, at least 8 glasses of water.
2. Increase your intake of foods rich in vitamins A, B2, B6 and minerals.
3. Use lip balm to protect your lips and avoid prolonged exposure to dry or cold environments.