Frequent colds usually have several causes as follows: 1. The most common cause is excessive weakness and poor immunity. From the point of view of Chinese medicine, this is a case of kidney deficiency, blood deficiency, spleen deficiency, resulting in the invasion of cold and wind, causing frequent colds. 2, from the point of view of Western medicine, frequent colds are caused by low body mass, poor immunity, internal environmental imbalance, acid-base balance disorders leading to frequent colds. If the patient has a history of heart disease, such as coronary atherosclerotic heart disease, myocardial blood supply is not complete, then it is easy to suffer from colds. Patients with chronic pulmonary diseases, such as chronic pulmonary heart disease, chronic obstructive pulmonary emphysema, chronic pulmonary hypertension, pulmonary insufficiency, are also prone to frequent colds.