You describe “lung pain on
both lower lungs for 4 months.” The
lung itself, when diseased, does not cause pain
. The membrane that surrounds it, the pleura, can cause pain when inflamed for any reason, infectious or other. This is called pleurisy and is a pain that is characteristically worse with breathing. When the pleura is irritated/inflamed sooner or later it is associated with an abnormal collection of fluid within the chest, called pleural effusion.