Patients want to cough effectively, first of all, they should adopt a suitable position. If physical strength allows, it is better to adopt a sitting or semi-sitting position to increase the abdominal pressure and reduce the pressure in the chest, which facilitates the expansion of the lungs and is more effective for coughing. It is necessary to drink more water. Drinking more water every day can keep the mucous membrane of the respiratory tract moist, at which time the sputum can be effectively diluted and the viscosity will decrease, at which time the sputum is easier to cough out, instead allowing the patient to carry out an effective cough. In addition, when coughing, deep breathing can help coughing up sputum. Take a deep breath, then hold your breath for a moment at the end of inhalation, then cough again, and take a deep breath after coughing, which can make the sputum move from the deep part of the airway to the large airway, which is more effective. Then the chaperone next to you taps on the back to help cough up phlegm is also more effective. In addition, paying attention to the ventilation of the room and keeping the air moist is also more helpful for effective coughing.