Bronchitis is very common clinically and can be divided into chronic bronchitis and acute bronchitis depending on the duration of the illness. Typically, in cases of severe coughing, bronchitis may present with symptoms such as cough, sputum production, shortness of breath, chest tightness, and even blood in the sputum. Generally, bronchitis does not cause the patient to spit blood, which is usually indicative of upper gastrointestinal bleeding. However, inflammatory lesions in the bronchi can cause the small capillaries on the surface of the bronchi to rupture during severe coughing, leading to bleeding that is typically manifested as blood-streaked sputum. In cases where there is a large amount of bleeding, vomiting blood may occur, making it a relatively common clinical occurrence.