Serious symptoms of pulmonary tuberculosis are as follows: 1. hemoptysis, patients with pulmonary tuberculosis can usually occur with blood in the sputum or hemoptysis, and hemoptysis can occur when a pulmonary cavity is formed, which can be life-threatening if not treated promptly. 2. with the destruction of lung tissue can be secondary to the formation of a pneumothorax, and patients can experience significant chest pain and dyspnea. 3. patients without active and effective anti-tuberculosis treatment can lead to The most serious complication of pulmonary tuberculosis is cerebral tuberculosis. 5. The most serious complication of TB is cerebral TB, in which patients can have abnormal mental and neurological changes as well as seizures, convulsions, hemiplegia and even clinical death.