Coughing up phlegm from the lungs generally requires several maneuvers such as securing the position, patting the back and turning the body, thinning the mucus secretion, and medication. 1. Ensure the position: avoid lying down when trying to cough up phlegm in the lungs, and recommend lying on the side with the head down and feet up. 2. Attention to pat the back, turn over: through the above actions, generally can make the low-hanging parts of the phlegm into the larger trachea, bronchial, easy to cough out with coughing action. 3. Dilution of viscous secretions: It is recommended that water molecules be atomized to dilute the viscous secretions in the lower lung units with the help of an electric ultrasonic nebulizer, pneumatic, etc., and then coughed up with coughing action. 4. Medications: Expectorant medications such as Ambroxol Hydrochloride, Acetylcysteine, etc. are applied to dilute the phlegm so that it can be easily expelled with coughing. In addition to coughing up phlegm in the lungs can also be through the appropriate coughing method, etc., phlegm, difficult to cough up the situation is recommended to consult a doctor in a timely manner, under the guidance of the doctor for treatment.