Lung bleeding is an intense flow of blood through the vascular wall of the alveoli (venous or arterial).
Damage to the lung parenchyma is characteristic of traumatic wound channels; they occur as a result of lung contusion, rib fractures combined with compression of the lung, as well as as a result of stabs and chopped wounds. Wounds, gunshot injuries, etc.
There are acute bleeding in the lungs due to damage and rupture of their parenchyma (up to 5 days), chronic pulmonary bleeding after injury for more than 5 days (from damage to large vessels)
But you can easily, for example, find yourself in a situation where you have light bleeding. Of course, even such a terrible event as a hemorrhage in the lung can happen to anyone. And not necessarily in the case of a serious car accident. Injury from a fall can also lead to unpleasant consequences. Or a burn. The fact is that with severe injuries, vascular permeability increases, and blood can go anywhere, including