Pulmonary hypertension can be caused by many factors, and different diseases have different causes and different manifestations. Therefore, a clear history from the patient will help the doctor to make a preliminary judgment of the type of disease and to give the appropriate tests accordingly, so as to avoid detours in the diagnosis. The content of the history should include: when the symptoms started and how they manifested, whether there were any triggers before the symptoms appeared, such as cold, sports, after a long trip, after trauma or surgery, etc., and how the symptoms could be relieved, and how the severity of the symptoms progressed, etc. In addition, the history of previous diseases such as heart disease, lung disease, diabetes, hepatitis B, AIDS and other infectious diseases, as well as personal history, such as whether there was long-term exposure to dust, radioactive sources, whether the patient was taking diet pills, birth control pills, and whether the patient was on a diet. Personal history such as long-term exposure to dust, radioactive sources, use of diet pills, birth control pills, menstrual history, fertility history, family members’ disease status, etc. The preliminary diagnosis is made based on these past conditions and the reported medical history and physical examination. Gu Qing, Department of Cardiovascular Medicine, Fu Wai Hospital, Beijing, China