Pleural disease is any problem with the thin, slippery lining around the lungs. When this lining gets inflamed, infected, or filled with fluid, every breath can hurt.

Sharp chest pain is the hallmark. It stabs on one side and gets worse when you inhale, cough, sneeze, or roll onto the affected side.

Shortness of breath creeps in. You puff climbing one flight or can’t finish a sentence without pausing, even if the lung itself is healthy.

Dry cough is common. It’s hacking and non-productive, triggered by the irritated lining.

Crackling or rubbing sound can be heard. A doctor’s stethoscope picks up a leathery rub; you may feel it as a vibration.

Fever and night sweats appear if infection is the cause.

Late signs include blue lips, rapid breathing, or a hard time lying flat—an alarm that fluid or air is trapping the lung.