Clinical diagnosis of tuberculosis in children can be made by history, symptoms and examination. 1. Medical history: If there is a tuberculosis patient in the family, or if the child is in close contact with a person infected with tuberculosis bacillus, the child may have tuberculosis. 2. Symptoms: If the child is in the latent stage of the disease, there may be no clinical manifestations of tuberculosis, and patients with inactive tuberculosis may also have no obvious symptoms, and only abnormalities are found during examination. For patients with active TB, there may be cough, sputum, night sweats (abnormal sweating after going to sleep and stopping after waking up), chest pain, weakness, blood in sputum, intermittent or persistent afternoon low-grade fever, weight loss and other symptoms. 3. Examination: blood sedimentation can be accelerated, if coughing up sputum, sputum smear can be positive to find antacid bacilli. Chest X-ray is the first choice for diagnosis of tuberculosis, and abnormal shadows can be seen in the lungs of patients, such as enlarged lymph nodes in the lungs, nodular shadows, plaques, and cords and stripes shadows, and so on. When Mycobacterium tuberculosis nucleic acid test is positive, it means that the child is infected with Mycobacterium tuberculosis. Meanwhile, fiberoptic bronchoscopy and CT scan of the chest in patients with tuberculosis may also show abnormalities. If a child is suspected of having tuberculosis, especially if he or she has had contact with a patient with tuberculosis and has suspicious symptoms, it is recommended that parents take their child to a regular hospital for a checkup to confirm whether the child has tuberculosis. After the diagnosis of tuberculosis, should actively cooperate with the doctor to use medication, do not indiscriminate use of drugs or prescriptions.