Coughing and spitting white foamy sputum is usually due to chronic bronchitis, acute bronchitis, cardiac insufficiency and so on. 1. Chronic bronchitis: the resulting bronchial mucosa cupular epithelial hyperplasia, increased secretions, whether acute exacerbation or remission may appear cough, cough a lot of white foamy sputum; 2. Acute bronchitis: the infecting agent may not be a pyogenic bacterium, but may be a virus, chlamydia, mycoplasma, and therefore coughing may be accompanied by white frothy sputum. This white foamy sputum may be caused by pathogenic organisms leading to proliferation of cup-shaped cells in the bronchial mucosa and increased mucus secretion; 3. Cardiac insufficiency: cardiac factors lead to cough and white foamy sputum. Cardiac insufficiency in some patients with acute and chronic heart failure can lead to pulmonary stasis and congestion of the pulmonary blood vessels, which may produce coughing, and due to alveolar and interstitial edema, coughing may be accompanied by white foamy sputum of varying degrees. Coughing and spitting white foamy sputum may also be caused by other reasons, you need to go to the hospital in a timely manner, combined with the results of the examination, under the guidance of the doctor’s treatment.