If you have a cough after bronchitis has resolved, it is likely that you have symptoms of airway hyperreactivity. Bronchitis induces airway hyperreactivity, so you will have a cough that is always bad. First of all, you can go to the hospital to check the bronchial diastolic test or bronchial excitation test. If the test result is positive, the diagnosis of coughing due to airway hyperreactivity can be confirmed, that is, the presence of cough variant asthma. This can be treated with bronchodilators and glucocorticoids, such as nebulized inhaled terbutaline sulfate and budesonide. In addition, in adults, direct inhalation of Cymbalta can be used to relieve cough symptoms. If the bronchitis is not completely healed, a chest CT can confirm the diagnosis. If it does not heal, hospitalization is required for intravenous medication, and appropriate antibiotics and antiviral medications should be given depending on the type of infection.