what causes blood to fill up in the lungs
Blood may also fill inside the lungs but this usually occurs as a result of severe trauma and the cause is clearly evident, like in a gunshot or stab wound. In most trauma cases where blood can fill into the lungs, the lungs collapse and the blood accumulates around the lungs in the pleural space (hemothorax). Infections like tuberculosis (TB) or lung cancer may also cause blood accumulation inside the lungs.