Pregnant women are affected by viral infections, radioactive radiation and certain medications, lack of nutrition and certain genetic factors during the first trimester of pregnancy that cause abnormal heart development in the fetus to cause congenital heart disease. Common congenital heart diseases include atrial septal defect, ventricular septal defect, tetralogy of Fallot, patent ductus arteriosus, pulmonary valve stenosis, large vessel misalignment, aortic constriction and tricuspid atresia. More severe congenital heart disease will have obvious signs and symptoms in infancy, such as marked cyanosis, conjunctival congestion, and a preference for squatting for a few moments before getting up and walking. Congenital heart disease has the following common symptoms, but mild congenital heart disease can have no obvious symptoms. 1, cyanosis: Cyanosis is a prominent manifestation of cyanotic congenital heart disease (such as large-vessel misalignment, tetralogy of Fallot, etc.). It can persist after birth, or gradually become obvious three to four months after birth, and is most obvious in the lips of the mouth, finger (toe) nail bed, and the tip of the nose. The latent cyanotic heart disease (such as ventricular septal defect, atrial septal defect, arteriovenous ductus arteriosus) usually does not have cyanosis, but only appears when activity, crying, breath-holding or pneumonia, and persistent cyanosis can appear when pulmonary hypertension and right heart failure occur in late stages. 2, heart murmur: most congenital heart disease can be heard murmur, this murmur is relatively loud, rough, severe cases can be accompanied by the anterior chest area tremor. The heart murmur is mostly detected by the doctor during the consultation. Some normal children can have physiological murmurs. 3, poor physical strength: due to poor cardiac function, insufficient blood supply and hypoxia, seriously ill children have feeding difficulties in infancy, stopping after a few sips, shortness of breath, easy to vomit and sweat a lot, like to hold vertically, older children are reluctant to move, like squatting, easy to fatigue after activity, paroxysmal dyspnea, severe hypoxia often in nursing, crying or feces suddenly fainted, easy to develop heart failure. 4, prone to respiratory infections: most congenital heart disease due to increased pulmonary blood, usually prone to repeated respiratory infections, repeated respiratory infections and further lead to heart failure, the two often cause each other, become the cause of death of congenital heart disease. 5, heart failure: neonatal heart failure is considered an emergency, usually most of the children have more serious heart defects, and its clinical manifestations are due to the pulmonary circulation, body circulation congestion, reduced cardiac output, the child’s face pale, breath-holding, dyspnea and tachycardia, blood pressure is often low, can hear the gallop rhythm, the liver is large, but peripheral edema is less common. 6, squatting: children with cyanotic congenital heart disease, especially successful children with tetralogy of Fallot, often appear squatting signs after activity, which can increase the body circulation, vascular resistance and thus reduce the right-to-left shunt generated by the septal defect, and also increase venous blood return to the right heart, thus improving pulmonary blood flow. 7, pestle finger (toe) and erythrocytosis: cyanotic congenital heart disease is almost always accompanied by pestle finger (toe) and erythrocytosis. The mechanism of pestle finger (toe) is unknown, but erythrocytosis is a physiological response of the body to arterial hypoxia. 8, pulmonary hypertension: When patients with septal defect or arteriovenous catheterization nationwide develop the well-known syndrome of severe pulmonary hypertension and cyanosis, it is called Eisenmenger’s syndrome. The master’s clinical performance is successfully manifested as cyanosis erythrocytosis, pestle finger (toe) signs of right heart failure, such as jugular vein anger, hepatomegaly, peripheral large conductive tissue edema, when the patient has lost the opportunity of surgery, the only thing waiting is heart and lung transplantation. 9, developmental disorders: congenital heart disease children are often abnormal development manifested as citation thin malnutrition stunted growth. 10, other symptoms: congenital heart disease, such as left atrial enlargement or pulmonary artery compression of the recurrent laryngeal nerve, since childhood hoarse cry, shortness of breath, cough; combined with other malformations, such as congenital cataracts, cleft lip and palate and congenital stupidity; ventricular enlargement can lead to anterior heart area bulge, thoracic deformity; persistent cyanosis can be accompanied by pestle finger, mostly formed 1 to 2 years after the appearance of cyanosis.