Often accompanied by a slight cough may be chronic bronchitis, cough variant asthma, chronic pharyngitis and other diseases. 1. Chronic bronchitis: the etiology of chronic bronchitis is not completely clear, it may be caused by factors such as the environment, smoking and the long-term effect of the body. The main symptom of chronic bronchitis is coughing, coughing up sputum, wheezing and other symptoms. 2. Cough variant asthma: the cause of the disease is not yet clear, is currently believed to be genetic, environmental factors. Cough variant asthma patients will have symptoms such as irritating dry cough, but patients will be aggravated at night or in the morning, daytime symptoms are less severe. 3. Chronic pharyngitis: the etiology of chronic pharyngitis is more complex, and it is considered to be caused by bacteria, occupation, environment and other factors. The main symptoms of patients are sore throat, dry cough, dry throat, and foreign body sensation in the throat. 4. Other: tonsillitis, reflux esophagitis and other diseases can also lead to patients often accompanied by a slight cough. Patients with symptoms of frequent mild cough should consult a doctor in time and follow the doctor’s instructions for treatment.