There are many reasons why a cough is always bad. First of all, chronic diseases of the lungs tend to lead to a cough that is always bad, such as chronic bronchitis, bronchial dilatation or tuberculosis, all of which tend to lead to a cough that is always bad. Because of the presence of some chronic inflammation, inflammatory secretions are always produced, leading to a cough that needs to be treated with anti-inflammatory drugs during the acute phase. In the case of tuberculosis, professional anti-tuberculosis treatment at a specialized tuberculosis hospital is required, and it takes six months to a year of continuous treatment to recover. In the case of chronic bronchitis or bronchiectasis, anti-inflammatory treatment with appropriate and sensitive antibiotics based on sputum culture results is needed in the acute phase to stop coughing. Secondly, if there is asthma caused by airway hyperresponsiveness or cough variant asthma, it is also easy to happen that the cough is always bad and is caused by the spasm of bronchial smooth muscle due to airway hyperresponsiveness, and it is necessary to inhale Cymbicort to relieve the symptoms of cough.