Feeling chest phlegm can not cough chest tightness, may be pneumonia, bronchitis, tuberculosis and other diseases. 1. Pneumonia: Klebsiella, Pseudomonas aeruginosa, Mycobacterium influenzae and other pathogenic infections may induce pneumonia, resulting in the patient feeling unable to cough up phlegm in the chest cavity, chest tightness, the patient may also be accompanied by coughing, shortness of breath, dyspnea and other symptoms. 2. Bronchitis: If patients inhale irritating gases or upper respiratory tract infections such as bacteria, viruses and other pathogens, it is easy to induce bronchitis, so that the patient feels chest phlegm can not be coughed up, chest tightness, the patient is also prone to coughing, shortness of breath, fever, chills and other symptoms. 3. Tuberculosis: Tuberculosis is usually caused by Mycobacterium tuberculosis infection, the patient may feel chest phlegm coughing, chest tightness, but also easy to be accompanied by symptoms such as low-grade fever, night sweats, fatigue, and lethargy. If you feel that you can not cough up phlegm in the chest cavity and chest tightness, it is recommended to go to the hospital, follow the doctor’s instructions for relevant examinations, to clarify the cause of the disease.