Most cases of coughing with white foamy sputum are found to be caused by chronic bronchitis. There are bronchiectasis, obstructive lung diseases, and malignant tumors of the lung in the early stage, also tend to cough white foamy sputum, but after the middle stage there will be bloody sputum. In the early stage of wind and cold, as viral infection also irritates the respiratory tract, it causes an increase in secretions, which stimulate the trachea to cough out, and often the sputum is also white foamy. Treatment with antiviral and cough suppressant drugs is needed, and in case of accompanying bacterial infection, effective antibacterial drugs are also needed. In addition, poor heart function may also cause this symptom.