There are more causes of dry cough all the time, and the main analysis is mainly the following: 1. Problems with lungs and trachea. If there is bronchitis, chlamydia pneumonia or mycoplasma pneumonia, it can cause a long-term recurrent dry cough. Also clinically rare, such as having tuberculosis and lung cancer, can cause irritating dry cough. In this case, it is generally recommended to go to a respiratory clinic for routine auscultation of the lungs, and then to take a lung CT test to identify the problem. 2. Problems in the throat, such as allergic pharyngitis, where the throat is allergic to microorganisms in the air, irritating gases or changes in temperature, causing severe coughing in the throat. In this case, anti-allergic symptomatic treatment is usually recommended, and Chinese medicine for pharyngitis can be applied for symptomatic treatment.3. If the patient has postnasal drip syndrome, long-term nasal reflux can also cause dry cough.4. The patient has reflux esophagitis, because long-term reflux stimulation of stomach acid can cause severe dry cough in the throat. Therefore, if you have dry cough repeatedly for a long time, it is recommended to go to the department of ENT, respiratory medicine, gastroenterology and other related departments for a systematic examination to avoid missing the condition.