Forced squatting is a squatting position or knee-to-chest position to relieve symptoms due to difficulty breathing and palpitations during short distance walking or other activities. It is seen in cyanotic congenital heart disease. In mild congenital heart disease, there are no obvious symptoms, and it usually manifests itself only after it has developed to a certain extent. Below we briefly introduce some common symptoms of pediatric congenital heart disease for examination. 1. Cyanosis. It usually persists after birth, or it may gradually appear 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. 2. Heart murmur. Most congenital heart disease can be heard murmurs, which are relatively loud and rough and can be accompanied by tremors in the anterior chest area in severe cases. Some normal children will have a physiological murmur. 3.Poor physical strength. Due to poor cardiac function, insufficient blood supply and hypoxia, seriously ill children have feeding difficulties in infancy, older children are reluctant to move, prefer to squat, easily fatigued after activity, paroxysmal dyspnea, and those with severe hypoxia often faint suddenly when nursing, crying or defecating, and are prone to heart failure. 4, prone to respiratory infections. Most congenital heart disease due to increased pulmonary blood, usually easy to suffer from respiratory infections, which further leads to heart failure, the two are often mutual cause and effect, becoming a major cause of death in children. 5. Heart failure. Usually most of them are due to children with more severe heart defects, and the clinical manifestations are due to congestion in the pulmonary circulation and body circulation and reduced cardiac output, the children are pale, breath-holding, dyspnea and tachycardia, blood pressure is often low, and the liver is large, but peripheral edema is less common. 6. Developmental disorders. Children with congenital heart disease often have abnormal development manifested as citation thinness malnutrition stunted growth, etc.