In general, drinking salt water can play a role in cleaning the oral cavity, dilute oral secretions, but can not play a role in cough. Salt water has no role in treating cough, drink some salt water, help dilute oral secretions, to keep the mouth clean, at the same time, concentrated salt water may relieve the congestion and edema of the mucous membrane of the pharynx, alleviate the symptoms of coughing due to laryngitis, but can not treat the disease of laryngitis itself. At the same time can cause cough symptoms of more diseases, can be a cold, bronchitis, pneumonia, cough variant asthma, etc., generally drinking salt water is no therapeutic effect. To summarize, drinking salt water has no therapeutic effect on cough. It is recommended that patients should consult a doctor in time to identify the cause of the disease and treat the symptoms.