1. Children with congenital heart disease are prone to heart failure after pneumonia, so they should be seen in a timely manner if they have fever and cough as a precaution. 2. Once the child is found to have symptoms such as shortness of breath, irritability, rapid heart rate and difficulty in breathing, heart failure may have occurred and the child should be sent to the hospital immediately. 3, cyanotic children, if they appear irritable, no longer responsive to general diet, call and other stimuli, no longer crying or only moaning, obvious respiratory distress, cyanosis significantly aggravated, gray —– this is called hypoxic attack, serious cases can be fatal, is the most common cause of death in such children. Once this condition occurs, immediate medical attention should be sought.