Many causes can lead to dry and cracked lips, for example, vitamin B deficiency can cause xerostomia and even dry and cracked lips. By adjusting your diet to include more fresh vegetables and fruits, as well as whole grains, you will be able to prevent dry and cracked lips caused by vitamin B deficiency. In addition, if you lick your lips repeatedly, this bad habit may aggravate dry and cracked lips. Some people have unhealthy lifestyles, eat a lot of spicy and stimulating foods, have diets high in oil, salt and sugar, and smoke and drink a lot of alcohol and lack sleep. Through reasonable and balanced nutrition, less oil, salt and sugar, scientific exercise, quitting smoking and limiting alcohol, and paying attention to sufficient sleep, most people can alleviate dry and cracked lips. If it is the mouth or teeth, as well as the nose some diseases can also cause obvious dry and cracked lips. If the use of poor-quality lipstick is not able to retain the moisture of the lips and mouth, may also cause chapped lips. In addition, diabetes, hypercalcemia, and dry syndrome, and even psychosomatic irritable thirst and urolithiasis can cause dry and cracked lips. Doctors will examine the symptoms in detail to find the cause and treat accordingly, but the most common is still an unhealthy lifestyle, and many people’s symptoms can be relieved through good lifestyle development.