Cough is a reflex action. Cough reflex can be caused when the receptors on respiratory mucosa are stimulated. Cough reflex is a defensive reflex, which helps to keep the respiratory tract clean and unobstructed. If the method of coughing is not correct, it will not only consume physical strength, but also cause bronchospasm and shortness of breath. Therefore, mastering the correct and effective cough method can promote the discharge of bronchial secretions more effectively. Frequent coughing can be helped by drinking fresh tea, and relieving cough and regulating lung can help the respiratory tract return to normal.

Use the right way to cough up phlegm, don't passively cough up phlegm when sputum stimulates the airway and throat, and take the initiative to cough up phlegm. The correct way to cough should be: inhale slowly and deeply before coughing, and hold your breath for a while after inhaling. Then the trunk leans forward slightly, and the arms on both sides bend, lying flat on the lower parts of the chest walls on both sides, adducting and slightly pressurizing. When coughing, the abdominal muscles contract hard, and the abdominal wall invaginates. If you inhale once, you can cough three times in a row. Stop coughing and shrink your lips to breathe out the remaining gas as much as possible. Breathe in slowly or quietly for a moment, and prepare for coughing again. If deep inhalation induces cough, you can try to inhale intermittently in several times to try to fully inflate the alveoli to increase the efficiency of cough. In this process, we should also pay attention to the consistency of the action and achieve it in one go. At the same time, when coughing, you can also knock on the front chest wall, or knock on the back chest wall with the help of family members to vibrate the secretions in the bronchus, so as to increase the efficiency of coughing and expectoration. When the sputum is thick and difficult to cough up, expectorants can be used to decompose mucin in the sputum, so that the sputum becomes thin and easy to cough up. At the same time, in order to make the expectoration smoother, you can drink some hot drinks and wet expectorant liquid, because enough water can dilute the sputum, which makes it easier to cough up.