Generally through coughing, the foreign bodies and secretions in the airway can be discharged to keep the airway unobstructed, you can take the right way to cough, you can drink more warm boiled water, fruit juice, make the sputum become thin to avoid the sputum is too sticky and dry to promote its discharge. Patients should stabilize their emotions and adopt a semi-sitting position, inhale deeply as much as possible and then hold their breath, and then exhale vigorously to cough out the phlegm as deep as possible in the lungs. In addition, family members can also knock the patient’s back from bottom to top to vibrate the phlegm in the lungs to promote its expulsion from the airway. If necessary, the patient can also adopt the head-down-feet-up position for phlegm drainage to utilize the earth’s gravitational force to expel the phlegm.