Lumbar spine tuberculosis cannot be seen with a blood test, which can be used to determine whether the tuberculosis is in an active stage. The diagnosis of lumbar spine tuberculosis also needs to be combined with other laboratory tests, imaging tests, pathologic tests, and so on. Consult your specialist for details. Blood tests mainly refer to routine blood tests, blood sedimentation, C-reactive protein and so on, and the results have no obvious specificity. Blood sedimentation can be an important indicator for detecting whether the lesion is static and recurrent, and C-reactive protein can be used to diagnose the activity of tuberculosis and determine the clinical efficacy of treatment. 1. Laboratory examination: (1) Bacteriology: diagnosis can be based on finding antacid bacilli in pus or lumbar spine joint fluid smear or positive culture of Mycobacterium tuberculosis, but the positive rate is low. (2) Immunology: e.g. tuberculin test. (3) Molecular biology: e.g. polymerase chain reaction, Xpert MTB/RIF technique. 2. Pathologic examination: the important methods to confirm the diagnosis are puncture biopsy of lumbar spine lesion site and postoperative histologic and microbiologic examination. 3. Imaging examination: X-ray, CT, MRI, ultrasound, arthroscopy and so on. For those who suspect lumbar spine tuberculosis, it is recommended to consult the doctor in time for examination and clear diagnosis.