Coughing for a month or longer, you need to go to the hospital for examination, identify the cause and then active treatment, you can go to the hospital to hang up the respiratory department, blood tests to do routine blood tests, you also need to take a chest X-ray or do a CT examination of the lungs, but also need to do the airway reactivity of the examination, lung function test, if necessary, you also need to do sputum test, drug sensitivity test. According to the results of the examination, under the guidance of the doctor with medication, if it is caused by bacterial infection, you need to use effective antibacterial drugs to actively treat. If it is caused by allergies, it can be treated with a combination of terbutaline cloth and dinette spray, and it also needs to be prevented and treated with montelukast sodium.