Coughing sputum continuously for more than a year may be related to respiratory diseases, cardiovascular diseases, rheumatic diseases, digestive system diseases, etc.. 1. Respiratory diseases: chronic bronchitis, chronic obstructive pulmonary disease, bronchial tuberculosis, bronchial asthma, lung tumors, etc., can cause chronic cough and sputum. 2. Cardiovascular diseases: left heart failure caused by mitral stenosis, which can cause pulmonary stasis or pulmonary edema, thus causing cough and sputum. 3. Rheumatic diseases: systemic lupus erythematosus, dry syndrome and other diseases, involving the lungs, can also cause chronic cough and phlegm. 4. Digestive system diseases: gastroesophageal reflux disease (GERD), laryngitis, chronic cough, asthma and other extraesophageal symptoms. Prolonged coughing up sputum, it is recommended to go to the hospital for timely treatment.