4) Chronic Mucus Production
Also called phlegm or sputum, mucus is produced by a special type of tissues in the lungs, and it serves as a defense against irritants, dust particle, and pathogens. Although mucus production is a normal and healthy process, excessive production lasting a month or longer can possibly be a sign of lung cancer.
The hallmark of lung cancer is the production of red or rusty sputum (due to the presence of blood in it). If you are experiencing excessive mucus production along with other symptoms of lung disease, don’t waste your time to get yourself checked by a physician.
