You can know whether you have tuberculosis at an early stage by the clinical symptoms and the aspects of laboratory tests used to diagnose tuberculosis. Tuberculosis is a chronic infectious disease caused by Mycobacterium tuberculosis infection, the most common is pulmonary tuberculosis, other such as mesentery, peritoneum, lumbar vertebrae, mammary glands and other organs of the whole body can occur tuberculosis infection. Except for a small number of people with acute onset, the vast majority of patients have a chronic clinical course. Currently, the diagnosis of early tuberculosis can mainly rely on symptoms and relevant laboratory tests to clarify. When the patient has symptoms such as prolonged low-grade fever, fatigue, lethargy, night sweats, etc., it is important to be alert to the presence of tuberculosis infection. In addition, if there are recurrent or prolonged coughing and sputum, or respiratory tract infections that do not improve after 3-4 weeks of anti-infective treatment, as well as blood in the sputum or hemoptysis, etc., it is also important to rule out the possibility of tuberculosis infection. Tuberculin Pure Protein Derivative (TB-PPD) or Bacillus Calmette-Guerin Protein Derivative (BCG-PPD) test is a method of early diagnosis of tuberculosis. Positive test is considered to be the presence of tuberculosis infection or previous infection with tuberculosis, or after BCG vaccination, and a strong positive test suggests the presence of active tuberculosis. In addition to this, to determine the presence of TB infection at an early stage, it is necessary to use sputum smears with antacid staining for microscopic examination. This method is one of the quickest and easiest to use, and the diagnosis of tuberculosis can be confirmed with a positive sputum smear stained with antacid microscopy.