Coughing every day without cold symptoms may be related to respiratory system diseases, digestive system diseases, drug side effects and other reasons. 1. Respiratory diseases: such as tuberculosis, tuberculosis bacillus leads to lung infection, which will cause an inflammatory reaction in the trachea and bronchial tubes, stimulating the body to cough, with a dry cough or a small amount of mucus sputum as the main. If combined with bronchial tuberculosis, manifested as irritating cough. 2. Digestive system diseases: such as reflux esophagitis, due to reflux of gastric contents can stimulate the pharynx, thus causing cough symptoms. 3. Drug side effects: angiotensin-converting enzyme inhibitors such as captopril, a common side effect of which is an irritating dry cough, may cause a daily cough even in the absence of a cold. There are many other reasons for coughing every day without cold symptoms, such as repeated coughing, it is recommended to go to a regular hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.