There are physiological and pathological reasons for children’s white lips. Pathological reasons include anemia, heart disease, and digestive system diseases such as diarrhea. 1. Physiological reasons: the lower temperature of the external environment, the child’s clothes wear less and other factors will lead to the whole body’s capillary contraction, thus appearing lips white, cold limbs of the symptoms. Secondly, the child in a high degree of tension, mental stress can also appear in the case of white lips. 2. Pathological factors: when anemia is severe, hemoglobin decreases, and the oxygen-carrying capacity decreases severely, which can lead to tissue hypoxia and ischemia, and the patient manifests as white lips and mental depression. Children with congenital heart disease may have white lips due to insufficient blood supply as a result of blood shunting. In severe cases of diarrhea, children may experience vomiting and diarrhea, resulting in white lips due to dehydration. Children with white lips may also have other causes, it is recommended to go to the hospital in a timely manner, complete the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or therapy.