Different shunt direction of congenital heart disease can present different clinical symptoms, mainly manifested as palpitation, shortness of breath, fatigue and other symptoms. 1. Heart disease with left-to-right shunt: if the condition is mild, no symptoms may appear. In severe cases, palpitations, chest tightness, shortness of breath, sweating, fatigue and other symptoms may occur. Children with ventricular septal defects may also have difficulty eating and developmental disorders. Children with ventricular septal defects often have cough and shortness of breath. 2. Right-to-left shunt heart disease: the most serious type, the patient may have symptoms such as generalized bruising and cyanosis. Tetralogy of Fallot may be accompanied by shortness of breath, fatigue, and limitation of movement. 3. Congenital heart disease without shunt: the symptoms are mainly caused by insufficient ejection of blood from the heart. Symptoms such as weakness, palpitations, dyspnea, fainting and angina may occur. If complicated by heart failure, patients may also be accompanied by chest tightness, shortness of breath, edema and other symptoms. If there are any of the above related conditions, it is recommended to go to the hospital in time.