There are many factors for cracked mouth, such as dry skin, drug stimulation and food stimulation can trigger the symptom. Dry skin is mainly manifested by cracked lips and dry skin in other parts of the body, which can be accompanied by itchy skin all over the body. Cracked skin caused by drug stimulation is mainly manifested in cracked lips after taking certain drugs, and the cracking will gradually recover after stopping taking the drug. Food irritation mainly refers to irritating chapped lips caused by overly acidic, salty and alkaline food in contact with the lips, accompanied by obvious clinical symptoms such as pain and bleeding, etc. To improve the symptoms of cracked mouth, treatment is needed according to each person’s triggering factors. Eat less spicy and irritating food, do not take random drugs, usually you can apply moist petroleum jelly or glycerin, which can minimize the cracked mouth.