There are many factors that can cause dry cough in patients, and there are several factors: 1. Environmental factors, when the air in the patient’s environment is too dry, air is not circulating or the indoor air has irritating odors, it will stimulate the mucous membrane of the patient’s throat and cause irritating dry cough. 2. 3. Some patients have dry cough due to infection of the trachea and bronchial tubes, and the respiratory tract will be stimulated by inflammation. When dry cough occurs, it is recommended that patients go to the hospital for relevant examinations to clarify the cause, and if it is caused by a disease, it should be treated in a timely manner.