Children with dry and cracked lips consider the following two factors: i. Chronic lip infection. It may be related to certain long-term irritants such as licking the lips with the tongue, strong sunlight exposure, in the highland cold season or dry climate season can also often develop, and may also be related to bad habits such as like too hot, too hard food. Second, stomatitis. Stomatitis includes four conditions: the first condition, malnutrition stomatitis. The main lack of vitamins, folic acid, especially the B vitamins. The second condition, infectious stomatitis. It may be a viral infection or a fungal infection. The third condition, contact stomatitis. That is, allergy. You can apply topical fluorescence ointment or dexamethasone ointment, or you can take oral anti-allergy drugs paracetamol, reserpine or cetirizine. The fourth condition, traumatic stomatitis. Caused by trauma or severe physical irritation such as in the treatment of oral diseases, due to the corner of the mouth is pulled by the mouth mirror for too long may also be caused by trauma.