Children with broken skin and purple lips, common causes are environmental factors, vitamin deficiency, congenital heart disease, Kawasaki disease and so on. 1. Environmental factors: the external environment is cold and dry, and children drink less water, which can lead to broken skin and purple lips. 2. Vitamin deficiency: Vitamin deficiency, especially vitamin E deficiency, can lead to reduced skin repair function, appearing lips broken skin, purple. 3. Congenital heart disease: such as tetralogy of Fallot, pulmonary valve stenosis, etc., which leads to bruising of the body, and can also lead to purple lips. 4. Kawasaki disease: if the child has a persistent high fever, dry and cracked lips, rash, conjunctival congestion and other manifestations, you also need to exclude the possibility of Kawasaki disease. Children’s lips broken skin purple, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.