Tuberculosis latency usually does not need drug treatment, but need to strengthen the exercise, nutritional diet, help to enhance the body resistance, delay the onset of disease. The latent stage of tuberculosis refers to the absence of clinical symptoms such as coughing and sputum, and the absence of abnormalities in chest ct on imaging examination, but the body has been infected with Mycobacterium tuberculosis. The occurrence of the above situation can be regarded as tuberculosis latent period. The latent stage of tuberculosis is usually difficult to detect, because the body does not have any clinical manifestations, so it is easy to ignore, and when found to have reached the onset of the disease. When Mycobacterium tuberculosis infection is detected during the latent stage, drug treatment may be withheld. Anti-tuberculosis drugs usually have some effects on the human body, resulting in side effects such as vomiting, so medication is not recommended during the incubation period, but it is necessary to strengthen physical exercise as well as a nutritious diet to delay the onset of tuberculosis as much as possible. If there is any discomfort, consult a doctor promptly.