Tuberculosis cough is a coughing symptom caused by lung infection caused by Mycobacterium tuberculosis; common cough is mostly caused by the trachea and bronchi feeling external stimuli and can be seen in the manifestation of chronic pharyngitis, upper respiratory tract infection and other diseases. The two can be roughly distinguished by the accompanying symptoms of TB cough: 1. Coughing up blood: TB cough of more than two weeks’ duration or with blood in the sputum, a lighter cough, dry cough or a small amount of mucous sputum, about 1/3 of patients can show the phenomenon of coughing up blood, mostly in small amounts, and a few can show a large amount of hemoptysis. Common cough is mostly dry or accompanied by sputum, which can be white or yellow and usually does not show blood or fresh blood. 2. Hot flashes: Patients with tuberculosis can have prolonged afternoon hot flashes, i.e., feverish symptoms in the afternoon or evening, as the tides sometimes come and go. Patients with common cough can also have fever symptoms, but they are usually persistent fever that lasts for a shorter period of time; 3. Long duration of illness: cough symptoms lasting more than two weeks or blood in the sputum can be suspected as symptoms of tuberculosis, and patients with tuberculosis often have cough symptoms of longer duration as the main symptom. Patients with common cough tend to have a shorter duration of cough symptoms and often present as concomitant symptoms; 4. Other: Patients with tuberculosis can often present with symptoms such as fatigue, facial flushing, night sweats and weight loss. Patients with common cough mostly show discomfort in the throat and may also have symptoms such as nasal congestion, runny throat, sore throat, itchy throat, and foreign body sensation in the throat.