In the late stage of lung abscess, patients will have chronic consumptive symptoms and some malignant symptoms. 1. Chronic consumptive symptoms: in the late stage of lung abscess, the accumulation of a large number of bacteria and bacterial secretions in the lungs will lead to chronic consumptive symptoms such as coughing, coughing up sputum, hemoptysis, low-grade fever, night sweats and so on. 2. Malignant symptoms: patients with lung abscess in the late stage will have shortness of breath and chest pain due to severe lung involvement, and there will also be malignant symptoms such as mental depression and loss of appetite leading to weight loss. Once the patients appear lung abscess performance, should go to the hospital in time to accept the examination, and under the guidance of the doctor to accept the treatment, so as to avoid delaying the condition, leading to serious consequences, and even life-threatening.