The incidence of diabetes in children is rare, and its early symptoms are generally not very obvious, easy to be ignored by parents, even if they go to the hospital, the doctor may also be misdiagnosed as severe pneumonia, encephalitis, gastroenteritis and so on. However, with the continuous improvement of living standards, the incidence of diabetes in children is also on the rise, and its early symptoms are mainly as follows: 1, children are prone to various infections, especially respiratory and skin infections, female infants can be combined with mycosis fungoides vulvovaginitis and perineal inflammation as obvious. 2, excessive drinking and urination, and the incidence of diabetes in children is very low, and it is generally not obvious to parents. 2, there are more drinking, more urination, more food three more, easy to be hungry, but weight loss, wasting obviously, fatigue, mental depression. However, polyphagia is not a symptom that occurs in all children. Some children may have a normal or reduced appetite, lose weight or lose weight quickly, and fatigue and mental depression are also common. Diabetes mellitus combined with ketoacidosis should be considered if there is excessive drinking, excessive urination, vomiting, nausea, anorexia, or abdominal pain, diarrhea and leg pain. Respiratory infections such as fever and cough, or skin infections, vaginal pain and itching, and tuberculosis can co-exist with diabetes. Children with abnormalities should have their blood glucose checked promptly so that the diagnosis of diabetes is not missed and delayed.