Coughing sputum can be caused by a number of factors, usually respiratory diseases, including upper respiratory tract infections, chronic bronchitis, chronic obstructive pulmonary disease, bronchial asthma, bronchiectasis, pneumonia, tuberculosis, etc. Ear, nose and throat pathologies such as sinusitis and laryngeal cancer can cause coughing up sputum. Rheumatic diseases, cardiovascular diseases and gastro-oesophageal reflux disease can also cause coughing sputum.
Patients should visit a hospital promptly for a thorough analysis, taking into account medical history, physical examination, laboratory tests and imaging examinations.