The body will give some signals in the early stage of pulmonary embolism, but there is no such thing as 8 signals. In the early stages of pulmonary embolism the body will show symptoms such as chest pain, hemoptysis, dyspnea, fainting, fever, anxiety, and profuse sweating. 1. Chest pain: Chest pain is a common symptom of pulmonary embolism. The pain is mostly related to breathing and caused by edema and inflammatory exudation of the pleura. It is mostly pleurisy chest pain, and some patients also have chest pain similar to myocardial infarction in the early stage. 2. Hemoptysis: the amount of hemoptysis is small, and hemoptysis is rare. 3. Dyspnea: Dyspnea is the most common sign of pulmonary embolism, and cyanosis may occur. The severity of dyspnea is related to the extent of the embolism. 4. Syncope: Syncope is often an early manifestation of pulmonary embolism because of insufficient blood supply to the brain. 5. Fever: may be related to pulmonary infarction, pulmonary atelectasis and infection, often low-grade fever. 6. Anxiety: because the embolism leads to a decrease in cardiac output, the patient will have anxiety and irritability. If the above symptoms occur, you should consult a doctor in time to find out the cause of the disease, so as not to miss the best time for treatment.