Coughing is a reflexive defensive action by which respiratory secretions and foreign bodies in the airways are removed. Sputum is a secretion from the trachea or bronchi or an exudate from the alveoli, which is expelled by coughing and is called coughing.
Respiratory tract infections are the most common cause of coughing and sputum. Chronic bronchitis, chronic obstructive pulmonary disease, bronchiectasis, bronchial dilation, bronchial asthma, bronchial tuberculosis, irritation of the trachea and bronchi by various physical (including foreign bodies), chemical and allergic factors, as well as bacterial, tuberculosis, fungal, viral, mycoplasma or parasitic infections of the lungs and tumours of the lungs can all cause coughing and/or coughing. cause coughing and/or coughing up sputum.