Cough is a general term, and dry cough belongs to cough. Cough can be divided into wet cough and dry cough, where wet cough means that the patient coughs with secretions and coughs up sputum. A dry cough is a cough with only phlegm and no phlegm, and a dry cough is referred to as a dry cough. Coughing itself is a protective and defensive reflex of the body, which is beneficial to the organism and can be used to cough up some harmful substances out of the respiratory tract and out of the body. However, excessive coughing, violent coughing, and prolonged coughing can also cause a lot of discomfort, and there is often an associated cause behind the cough. Whether it is a dry cough or a wet cough, the patient needs to be seen by a professional doctor for treatment.