Symptoms may vary depending on the site of invasion of nontuberculous mycobacteria, and common symptoms in patients include cough, enlarged lymph nodes, and skin abscesses. In addition, patients may develop other diseases such as synovitis. Some people infected with non-tuberculous mycobacteria do not have clinical symptoms in the early stage, and the symptoms may vary depending on the site of infection of non-tuberculous mycobacteria. If Mycobacterium non-tuberculosis infects the lungs, the patient will cough up sputum, hemoptysis, chest pain, shortness of breath, fatigue, emaciation and other symptoms. If Mycobacterium non-tuberculosis infects the lymph nodes and induces lymphadenitis, the patient will have unilateral painless lymph node enlargement, and some patients will also have fistula formation. If non-tuberculous mycobacteria infect the skin tissues, patients may develop skin abscesses and skin soft tissue nodules. If nontuberculous mycobacteria infection causes bone disease, patients will have synovitis, osteomyelitis, and septic arthritis. In addition, patients infected with nontuberculous mycobacteria can cause disseminated meningitis, pericarditis, and endocarditis. It is recommended that patients with nontuberculous mycobacteria infection need to seek medical treatment in time, and can choose appropriate measures for treatment under the guidance of doctors.