In principle, anticoagulation treatment for pulmonary embolism is to remove the cause of pulmonary embolism and take anticoagulants for at least six months afterwards. If the cause of pulmonary embolism or the cause of thrombosis is due to a problem in the blood system itself, such patients are born in a hypercoagulable state and are prone to thrombosis, anticoagulation in such patients requires lifelong use of these drugs. If the patient has been bedridden for a long time or has suffered a traumatic injury, the thrombosis caused by the injury to the blood vessels may lead to pulmonary embolism. But according to the patient’s specific situation, according to the results of the review to determine whether the drug needs to continue to eat. After all, anticoagulants have the risk of bleeding, so we have to weigh the need to take them against the risk of bleeding. If the patient has an ulcer or is very old and prone to bleeding, generally speaking, after the cause is removed, the drug can be stopped after six months.