After the occurrence of chest tightness and shortness of breath, it is recommended to go to the hospital for a systematic examination to clarify the cause of the disease and guide the treatment. Diseases that cause chest tightness and shortness of breath include respiratory diseases, heart diseases, digestive diseases, functional diseases and so on. 1. Respiratory diseases: bronchitis, pneumonia, and even tracheal foreign body blockage can cause chest tightness and shortness of breath, and it is recommended to actively check and treat in respiratory department. 2. Heart disease: Congenital heart disease, such as atrial septal defect, ventricular septal defect, arterial catheterization, etc., may cause abnormal pressure in the pulmonary artery, resulting in chest tightness and shortness of breath, and it is recommended to consult the Department of Cardiology for interventional blockage surgery or surgical open-heart surgery. 3. Digestive diseases: If the child is overfed and bloated, the diaphragm will move upward, which may also cause chest tightness. It is recommended to regulate the diet and give medicines such as gastrointestinal tablets to help digestion. 4. Functional diseases: If the examination of cardiopulmonary structural functions are normal, some children may sometimes have abnormal functional regulation and chest tightness, and then it is recommended to intervene in the child’s mood in a timely manner. After the occurrence of chest tightness and shortness of breath, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease and guide the treatment.