Infants with atrial septal defects of up to 5 millimeters can heal on their own, but if the defect is too large, it is difficult to heal on its own and requires timely surgical treatment. In addition, while the infant atrial septal defect is healing itself, parents also need to do a good job in strengthening the infant’s nutrition, preventing cold and warmth, regular checkups and other necessary care work and methods, as follows: 1. Parents should strengthen the care of infants, which will help the healing of the defect. Comprehensive nutrition can enable infants to heal themselves faster, and it is necessary to add some complementary foods in addition to breast milk. But don’t overdo it, the infant’s digestive system is not perfect, it is best to consult a specialist when adding complementary foods. 2. Pay attention to the cold and warmth, do not let the baby cold and cold, but also to help the baby to moderate exercise. 3. If possible, you can go to a specialized hospital for regular ultrasound examination of the heart, which is conducive to understanding the development of the disease. The specific treatment plan for the disease requires parents to go to a regular hospital to consult a professional physician.