It is clinically common for children to have a cough that occurs intermittently for two or three months. There are many causes, including pertussis caused by Borrelia infection, cough variant asthma, chronic bronchitis, chronic rhinitis, sinusitis, and bronchiectasis or tuberculosis. In addition, gastroesophageal reflux is not excluded. It is necessary to actively search for the cause of the cough in order to treat it symptomatically. It is recommended to take your child to the hospital for routine blood tests, lung X-ray or CT examinations, and bacterial culture under the guidance of a doctor to identify the cause and provide active treatment for the cause so that your child’s cough can be controlled and relieved as soon as possible and the body can return to normal.