The recovery time of pulmonary embolism after discharge from the hospital varies depending on the severity of the condition and the effectiveness of treatment. Usually, patients with pulmonary embolism who are detected early, have mild symptoms, and are treated promptly can gradually return to normal in about 3 months after discharge from the hospital; while patients with more serious conditions and poor treatment results may need anticoagulation for a year or even for life. Pulmonary embolism is mainly a clinical syndrome caused by various emboli blocking the pulmonary artery or branches of the pulmonary artery. There is a certain recurrence rate after treatment of pulmonary embolism, so it is necessary to continue treatment with anticoagulant drugs after discharge from the hospital. Anticoagulant therapy can, to a certain extent, alleviate the discomfort caused by pulmonary embolism and enable patients with pulmonary embolism to gradually return to normal. If an individual’s pulmonary embolism is mild and treatment is more timely, he or she can usually recover gradually by taking anticoagulant medication for about three months after discharge from the hospital; if the individual’s pulmonary embolism is severe and treatment is not effective, the duration of anticoagulation therapy may need to be extended to about one year; if the high-risk factors that triggered the pulmonary embolism persist, the individual may need to be treated by lifelong anticoagulant medication. After being discharged from the hospital with pulmonary embolism, the individual should take medication according to the physician’s instructions, follow up regularly, and go to the hospital in a timely manner once symptoms of discomfort occur so that the cause of the disease can be clarified and treatment can be carried out as soon as possible.