Pleurisy, this disease in clinical practice, does not cause symptomatic hemoptysis on its own. This is because pleurisy is mainly due to bacterial invasion into the pleural cavity causing inflammatory lesions. The pleural cavity is a sealed space, which, when inflamed, often causes symptoms such as fever, cough, chest tightness, shortness of breath, and breathing difficulties when there is a significant accumulation of fluid in the chest cavity. Generally, it does not cause hemoptysis. There is only one possibility, for example, intense irritative coughing in patients with pleurisy may rupture the capillaries in the bronchial walls. In this case, patients might experience varying degrees of coughing with blood, but this is not a direct clinical symptom caused by pleurisy itself.