If the lungs start to hurt what it means?

Some illnesses that can cause painful breathing include: pneumonia, a lung infection caused by a virus, fungus, or bacteria. tuberculosis, a serious bacterial lung infection. pleurisy, an inflammation of the lining of the lungs or chest cavity often due to infection.

it may mean you have a certain deases what so ever and maybe like smoking it couses lungs to shatter and couse serious illness