Various types of congenital heart disease show symptoms of different severity, when the baby has the following symptoms, both parents and doctors should think about whether the baby is suffering from precocious heart disease: 1, persistent heart and respiratory malfunction after birth; 2, restlessness, high pitched cry, weak sucking when feeding, feeding difficulties, weight gain; 3, persistent cyanosis or repeated confusion, crying or activity after shortness of breath, and 4, children with precordial disease are prone to recurrent respiratory infections and repeated “pneumonia” in the lungs; 5, older children will complain of chest tightness, precordial pain, panic, especially after activity, these symptoms are more obvious; 6, some children with cyanotic precordial disease may also appear pestle-like toes (i.e., the ends of hands or toes) Soft tissue hypertrophy, drumstick-shaped); 7, cyanotic precordial disease often have several special postures: infancy when holding the legs are not straight, like to bend in the adult’s abdomen, when sitting like to lift the feet to the stool surface, when standing lower limbs to maintain a bent posture. Older children walking, walking for a period of time to squat down two knees close to the chest to rest for a moment, medically known as “squatting” phenomenon.