The cause of pulmonary hypertension is complex, and there is no particularly effective treatment. Current treatment is focused on targeted therapy and lung transplantation, which is mainly used to alleviate clinical symptoms such as dyspnea and chest pain, and to help prolong survival time. There are many causes of pulmonary hypertension, such as congenital heart disease, left-to-right shunt, ventricular septal defect, atrial septal defect, arterial duct failure, tetralogy of Fallot, etc., which require surgical treatment and cannot be treated medically. Current treatments focus on targeted therapy and lung transplantation for ischemia, hypoxia and chronic lung disease, and long-term medication has also improved hypoxia. It is recommended that patients should not judge or diagnose on their own based on one result, but should consult a doctor in a timely manner, who will analyze the situation according to the specific circumstances and make a clear diagnosis.