Coughing up white bubbly sputum may be caused by COPD, bronchitis, cardiac insufficiency and other diseases, so this symptom does not indicate that there is something wrong with the lungs. COPD can be triggered by frequent smoking, dusty environments, or frequent inhalation of chemicals, which can lead to white bubbly sputum or white mucus sputum with occasional blood in the sputum. However, coughing up white bubbly sputum can also be caused by bronchitis, cardiac insufficiency and other diseases, so it is not possible to determine lung problems through this symptom. If the upper respiratory tract is infected with bacteria, viruses and other pathogens, triggering bronchitis, may also lead to coughing up white bubbly sputum, the patient is also easy to because of the sputum is sticky and not easy to cough out. If you suffer from myocarditis, ischemic heart disease and other diseases, also easy to induce cardiac insufficiency, resulting in patients coughing white bubble sputum. If the cough white bubble sputum frequently, it is recommended to improve the relevant laboratory tests to assess the cause of the disease and follow the doctor’s instructions to standardize the treatment, so as to avoid delaying the condition.