A child’s constant runny nose and cough can be caused by a respiratory infection or by an allergic condition. One of the symptoms of respiratory infections is a runny nose and cough, whether it is an upper respiratory tract infection, such as tonsillitis, pharyngitis, nasopharyngitis, or a lower respiratory tract infection, such as pneumonia, bronchitis, and capillary bronchitis, etc., are prone to such symptoms. In addition, if the child has an allergic disease, it is also easy to have a runny nose and coughing symptoms, usually runny nose, and coughing for a longer period of time, most of the children have a family history of allergic diseases. Children always runny nose and cough, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.