The clinical differences between pharyngeal bleeding and pulmonary bleeding are mainly as follows: 1. The causes are different. Most common causes of pharyngeal bleeding are acute pharyngitis, acute tonsillitis, ruptured hemangioma bleeding in the pharynx, or foreign body scratch bleeding in the pharynx. Pulmonary bleeding is mostly caused by bronchiectasis, lung cancer, tuberculosis and other diseases.2. The clinical manifestations are different. Patients with bleeding in the throat may clear their throat, resulting in localized bleeding in the throat. In patients with pulmonary hemorrhage, the bleeding is preceded by violent choking, cough reflex and other discomfort, and the blood clot is coughed out, and in patients with pharyngeal hemorrhage the blood clot is spit out. Patients with pharyngeal bleeding can be clinically determined by checking electronic laryngoscopy, which can be roughly determined. Patients with pulmonary bleeding clinically need to be diagnosed by doing pulmonary CT, bronchoscopy, etc.