Newborns have red diapers on the following three cases: First, false menstruation, belonging to the physiological situation, seen in female newborns, due to leave the mother’s body after the decline in estrogen levels caused by the 2 weeks or so will completely subside, the bleeding is not much does not need to be dealt with, if the bleeding is more need to be timely medical attention. Second, blood in the urine, common causes of urate crystals, urinary tract infection, need to improve the routine urine examination, according to the results of treatment, if it is urate crystals can be appropriate to give the child to drink more water or milk to dilute the urine, and if there is an infection need to be treated with anti-infection. Third, blood in the stool, common causes of coagulation dysfunction, infection or allergy, also need to improve the relevant examination for diagnosis and treatment.