Patients with congenital heart disease are suffering from congenital heart disease due to the malformation of heart blood vessel development which disrupts the normal pathway of blood circulation in human body, commonly there are ventricular septal defect, atrial septal defect, arteriovenous ductus arteriosus and other congenital heart diseases. So what should children with precordial disease pay attention to in their daily lives? One of the precautions for precardiac disease: try to keep the child quiet, avoid excessive crying, and ensure sufficient sleep. Exercise in moderation, strictly prohibit running and jumping and strenuous exercise, and ensure sleep at night to reduce the burden on the heart. Precautions for precardiac disease No. 2: Children with cardiac insufficiency tend to sweat more, so they need to keep their skin clean, bathe regularly in summer, rub themselves with hot towels in winter, and change their clothes and pants regularly. Feed more water to ensure adequate hydration. Precaution No. 3: Keep bowel movements smooth. When defecation is difficult, excessive force will increase the abdominal pressure and increase the burden on the heart, which may even have serious consequences. Precautions for precardiac disease four: indoor air circulation, avoid staying in crowded public places to reduce the chances of respiratory infections. You should add and remove clothes in time with the cold weather and pay close attention to prevent colds. Precaution No. 5: Regular follow-up visits to the cardiology outpatient clinics of hospitals, strictly follow medical advice to take medication, especially cardiac and diuretic drugs, must be absolutely controlled dose, on time, according to the course of treatment, to ensure the effectiveness of treatment. Before each dose of cardiac drugs, pulse count must be measured, if the heart rate is too slow, should immediately stop taking, to prevent drug toxicity, endangering the life of the child.