The causes of cough are respiratory diseases, pleural diseases, cardiovascular diseases, psychological diseases and other causes. 1. Respiratory diseases: such as colds, acute bronchitis, pneumonia, etc., which often cause acute cough; chronic bronchitis, chronic obstructive pulmonary disease, bronchiectasis, etc., which often cause chronic cough. 2. Pleural diseases: pleurisy or pleural irritation, such as spontaneous pneumothorax, thoracic puncture, etc., can cause cough. 3. Cardiovascular diseases: such as pulmonary stasis or pulmonary edema caused by mitral stenosis, etc. Cough can also be caused when pulmonary embolism is caused by dislodgment of thrombus in the right heart or venous body circulation. 4. Psychogenic cough: or habitual cough, psychogenic cough, relatively common in children. Typical performance is daytime coughing, focusing on a certain thing and coughing disappears at night when resting, often accompanied by anxiety symptoms. 5. Other: such as drug-induced cough, such as captopril and other drugs have cough adverse reaction; such as gastroesophageal reflux disease, acid reflux stimulation of the throat caused by cough. In addition to the above diseases, there are many other causes of cough, such as rhinitis, sinusitis, nasal secretion reflux stimulation. If frequent coughing, it is recommended that patients should consult a doctor in time to clarify the cause of the disease and standardize the treatment, so as not to delay the condition and affect the prognosis.