Cough a few months bad, but also need to consider the following conditions: first, cough variant asthma, this disease is often to stimulate the dry cough, mostly at night and in the early hours of the morning, in the smell of cold air, pollen or other irritating gases after the emergence of triggered cough and cough exacerbation. Treatment is mainly to reduce airway sensitivity and dilate the bronchial tubes, such as the use of montelukast sodium to reduce airway sensitivity, Schlitter to dilate the bronchial tubes. Second, chronic pharyngitis caused by reflux esophagitis, this condition can also cause cough. Cough is often mainly dry cough, always feel that there is something inside the throat, cough out, sometimes there will be acid reflux symptoms. The treatment of this condition is mainly to inhibit the acid in the stomach and take drugs for chronic pharyngitis, such as using omeprazole to inhibit stomach acid and slow Yan Shulin to treat chronic pharyngitis. Third, psychological cough, this cough is often related to the patient’s psychology. Treatment requires the patient to self-regulate and turn to professional psychological counseling if necessary.