Infants who cry until their faces turn purple and are silent are caused by the child crying more violently and experiencing transient hypoxia. Causing infants to cry violently is divided into two cases: physiological and disease, which need to be judged according to the presence of other uncomfortable symptoms, go to the hospital for a detailed examination, and intervene and treat under the advice of the doctor. I. Physiological factors: When frightened or traumatized, it will cause the child to cry more violently, resulting in lack of oxygen, there will be symptoms of purple face and inability to make sounds, you can let the baby lie vertically on the shoulders of parents to help the baby breathe smoothly to avoid suffocation. If the face is purple for a longer period of time, apnea, you need to be treated with oxygen as soon as possible to avoid causing brain damage. Second, disease factors: 1, congenital heart disease: If the baby is crying until the face is purple with accompanying symptoms, such as convulsions, etc., need to be considered congenital heart disease, need to promptly conduct electrocardiogram, cardiac ultrasound and other tests to clarify the diagnosis. If the diagnosis of congenital heart disease is confirmed, we should try to soothe the child and avoid the baby’s violent crying that leads to cyanosis, and most of the children need to undergo surgery or interventional treatment; 2, intestinal obstruction, intussusception: such violent crying of the baby may be due to intestinal obstruction, intussusception, which is a common disease in infants, intussusception can first follow medical advice to take non-surgical treatment, such as air enema, and in serious cases, surgical treatment; intestinal obstruction requires fasting If the infant cries frequently and vigorously, the infant will not be able to get the treatment. If an infant cries frequently and violently, it is likely to be caused by physical discomfort. If simple soothing cannot be relieved, he/she should seek medical attention to clarify the cause, pay attention to keeping the child’s respiratory tract clear, and clear the secretions from the nose and mouth in a timely manner.