Pulmonary embolism can, in rare cases, cause bloating and abdominal distension. The primary clinical manifestations of pulmonary embolism are chest tightness and difficulty breathing. Severe pulmonary embolism can also lead to a drop in blood pressure and sometimes may even cause the patient to faint. However, it is important to note that in severe cases of pulmonary embolism, patients may also experience abdominal distension. Patients with pulmonary embolism might also have acute pulmonary heart disease, which could include symptoms of gastrointestinal congestion. In such cases, patients may experience abdominal bloating. Additionally, there is a special condition known as chronic thromboembolic pulmonary hypertension, where patients may experience chronic pulmonary heart disease and chronic hypoxia, which can also lead to abdominal distension.