Non-tuberculous mycobacteria refers to non-tuberculous mycobacterial lung disease, non-tuberculous mycobacterial lung disease without coughing, wheezing or fever is not necessarily cured, but also may be from the heavy type to light type, need to follow the doctor’s advice to continue treatment. Non-tuberculous mycobacteria infection caused by lung lesions, clinical symptoms can be manifested as fever, cough, sputum, hemoptysis, dyspnea, fatigue, chest pain, emaciation and other symptoms, most of the chronic process. Mild cases of the disease may have no clinical symptoms or only hemoptysis. It can be seen, non-tuberculous mycobacteria lung disease patients do not cough, no wheezing, no fever is not necessarily cured, there may be a mild case of patients, if necessary, under the guidance of the doctor to continue treatment. Non-tuberculous mycobacteria are all mycobacteria other than Mycobacterium tuberculosis and Mycobacterium leprae, also known as environmental mycobacteria. Non-tuberculous mycobacterial disease is a lesion of tissue or organ caused by infection of the body with a non-tuberculous mycobacterium (commonly, such as lung, bone, or skin disease). When diagnosed with non-tuberculous mycobacteriosis, patients should actively cooperate with their doctors for treatment.