The length of incubation period of tuberculosis bacillus, clinical difference is very big, the shortest 2 weeks, the longest can be up to several 10 years or even lifelong not onset, in general to 4~8 weeks mostly. Mycobacterium tuberculosis into the body generally will not immediately onset of disease, the body resistance is poor, it is possible that 4 to 6 weeks or so will develop, or even 2 weeks will develop, if resistance is strong, tuberculosis bacilli in the body will be in a dormant state, will not cause any symptoms, the patient may also be in a long-term asymptomatic state is a latent infection, it is possible that the body trauma, malnutrition, and other causes of immune deficiency will develop. If the body is in good condition, it may not develop for life. Symptoms of tuberculosis include cough, low-grade fever, night sweats (abnormal sweating after going to sleep and stopping after waking up), and hemoptysis in some people. If you have any uncomfortable symptoms, you should go to the hospital as soon as possible for examination and follow the doctor’s instructions for treatment.