Clinical symptoms of tuberculosis are not typical in the early stage of the disease, and those with mild disease may have no symptoms at all. Patients who have symptoms also behave differently, so the following symptoms should alert the occurrence of TB The following symptoms should be alerted to the occurrence of pulmonary tuberculosis: no obvious cause: easy tiredness, fatigue, loss of appetite and weight loss; repeated attacks or persistent “cold” or “flu”; cough and sputum for more than two weeks without detecting the cause; blood in the sputum or hemoptysis; chronic low fever. Those who have the above symptoms should go to the local tuberculosis hospital or tuberculosis prevention station to rule out tuberculosis.