Dry lips may be physiological, but also may be related to some pathological reasons, such as chronic lipitis or diabetes and other diseases caused by. 1. Physiological reasons: if the environment is dry, hot weather, windy season, etc., and the lips are not enough local protection, intake of water is not enough, due to the environment, the body lack of water and other factors, resulting in physiological dry lips, but also often accompanied by some thirst and other physiological performance. 2. Chronic lipitis: the disease is mostly associated with a variety of chronic long-term persistent stimuli, such as dry climate, wind, chemicals, drugs, as well as lip licking, lip biting and other bad habits. Its performance is dry lips, burning, lower lip is the most common parts, sometimes localized will be accompanied by dryness, itching and pain and other symptoms. 3. Diabetes: dry lips should also consider whether there is a diabetic condition. Diabetic patients have the typical “three more and one less” performance. If dry lips are accompanied by thirst, excessive urination, excessive food and weight loss, be alert to the presence of diabetes. In addition, in addition to some of the causes mentioned above, it may also be related to some other causes, it is recommended that you can go to the hospital for examination, in order to clarify the diagnosis.