Children with congenital heart disease often have heart murmurs, so parents of babies born in regular hospitals know about their child’s disease after the initial examination by the obstetrician. There are also some attentive parents who find that their child is panting after feeding, crying is not loud, crying is short, the chest is undulating, touching the precordial area with hands has a tremor, some parents use their ears close to the child’s chest, they will hear a sound like “wind” or “thunder”. These parents bring their children to the hospital and often receive a diagnosis. However, many children are not born in regular hospitals, or local obstetricians are inexperienced, so the condition is not detected early enough after birth. Here are a few ways to detect heart disease for parents’ reference: Cyanotic congenital heart disease: The child’s mouth, lips, finger (toe) nails are blue, blue after crying, and in severe cases, the face and body are also blue, which is known as cyanotic congenital heart disease. It is the easiest phenomenon to detect and is medically known as a physical sign. Babies who develop cyanosis right after birth mostly have complex congenital heart disease, such as tetralogy of Fallot, tetralogy of Fallot, tricuspid atresia, pulmonary atresia, transposition of the great arteries, etc. If cyanosis appears a few months after birth, it is most likely to be tetralogy of Fallot. Cyanotic congenital heart disease may affect the blood and oxygen supply to the whole body because the structure of the heart is far from normal, and all children with this type of congenital heart disease are often accompanied by developmental disorders, short stature, and in some cases, mental retardation or other malformations in other parts of the body. Non-cyanotic congenital heart disease: There are many types of non-cyanotic congenital heart disease, and the severity of the disease varies greatly, some of them may have no manifestation and are often not easily detected in the early stage; some are very serious, such as poor growth and development, wasting, frequent fever, pneumonia, and heart failure. Parents often say that their children are more susceptible to colds than other children, and this illness is just fine, but the next one comes again, and other children get sick and eat a little and get better, but our children get sick and have to get infusions and even be hospitalized. If the skin is blue around the mouth, you should pay attention to the possibility of congenital heart disease, you need to consult a doctor in time. Some congenital heart diseases may go undetected by parents because the defect is small (e.g. small ventricular defect, small ductus arteriosus, etc.), the stenosis is not serious (mild pulmonary stenosis, aortic bicuspid malformation, etc.) or the hemodynamic impact is not significant (e.g. foramen ovale II septal defect), and the doctor may miss the diagnosis even without detailed physical examination. These diseases often have little impact on the body, and the timing of surgery is optional, except that early detection can prevent infective endocarditis Eisenmenger syndrome: If a child is born with a normal color and gradually develops cyanosis when he or she is a few years old, a teenager or an adult (mostly around 30 years old), we call this a red-then-purple type, which may be a left-to-right shunt type of congenital heart disease, such as ventricular defect, ductus arteriosus etc., which has developed severe pulmonary hypertension, medically known as Eisenmenger syndrome.