Chest feel phlegm is mainly due to the infection of the trachea and lungs, phlegm location is deeper, very viscous is not easy to cough out, it will stay in the local will cause. Common diseases are bronchitis, lung abscess, tuberculosis, and bronchial dilatation and other diseases caused by, to go to the hospital for a comprehensive examination, after a clear diagnosis and active treatment. Generally need to go to the hospital to draw blood for routine blood tests, also need to take a chest X-ray or do lung CT examination. If there is bacterial bronchopneumonia caused by, need to use effective antibacterial drugs to treat, also need to use sputum thinning drugs. In terms of diet, drink more water, eat more fresh vegetables and fruits, and you can use Sichuan shells, pears, honey water to assist in relieving cough and resolving phlegm treatment.