Cough for a month without improvement need to consult a doctor, according to the disease that causes symptoms, such as lung, digestive system, circulatory system diseases, respectively, cough anti-infection, acid suppression and improve circulation treatment. 1. Lung disease, is more common can cause chronic cough disease, can be due to lung infection, chronic bronchitis and other diseases, generally use penicillin and other anti-infective treatment, combined with dextromethorphan and so on for cough suppression treatment. 2. Digestive system, mainly refers to gastroesophageal reflux, gastric fluid can stimulate the esophagus leading to cough symptoms. It is usually treated with acid-suppressing drugs such as omeprazole. 3. Circulatory system, mainly refers to heart failure, can cause pulmonary stasis and cause cough, usually take the flower glycoside C, etc. to improve circulation treatment. The specific cause of the disease should be clarified after medical examination, and the treatment should be carried out according to the doctor’s instructions.