Whether the TB test is free or not mainly depends on where the test is done, usually at the local CDC TB test is free, you can do free sputum looking for antacids, liver function, chest X-ray. Inside the hospital to do TB examination is charged, if the symptoms are relatively mild, in the CDC can be clearly diagnosed as tuberculosis patients, is not required to go to the hospital. For the suspected and CDC has no way to confirm the diagnosis of tuberculosis patients need to go to the hospital for further examination, you can further do blood sedimentation, T-SPOT test or PPD test examination, if necessary, may need to do bronchoscopy and lung puncture and other related tests. As long as the diagnosis is clear, timely treatment can be.