Dry cough without phlegm tips lack scientific evidence and are unreliable. There are many reasons for dry cough without sputum, commonly found in cough variant asthma, reflux esophagitis, drug side effects, etc., need to be on the cause of drug or surgical treatment. 1. Cough variant asthma: It is a special type of asthma, which is mainly characterized by irritating dry cough, mostly occurring at night and in the early hours of the morning, without obvious symptoms such as wheezing and shortness of breath. It can be treated with inhaled glucocorticosteroids (e.g. budesonide) and bronchodilators (e.g. salbutamol) under doctor’s supervision. 2. Reflux esophagitis: a clinical syndrome characterized by coughing due to the reflux of stomach acid and other gastric contents into the esophagus. Proton pump inhibitors such as omeprazole or H2 receptor antagonists such as ranitidine, domperidone and other prokinetic drugs can be taken orally as prescribed by the doctor; if the effect of drug treatment is not obvious, anti-reflux surgery can be considered. 3. Drug side effects: such as taking captopril and other angiotensin converting enzyme inhibitors, its common side effect is irritating dry cough, can be replaced by valsartan and other angiotensin receptor antagonists under the guidance of the doctor. There are many reasons for dry cough without phlegm, it is recommended that patients go to the hospital in a timely manner, to clarify the cause of the disease, standardized treatment under the guidance of the doctor, do not blindly believe in the small trick, so as not to delay the condition.