This was recently asked during a beach diving meeting. I think it's important to pay attention to over-expanded lung damage [from uncontrolled rise] and secondary pulmonary embolism [air from the bloodstream of contaminated lung tissue].

Excessive lung expansion occurs when the SCUBA Diver holds its breath while rising underwater. This can rise 1.5 meters near the surface.

What happened [technical reasons]
from

  When using SCUBA equipment underwater, the diver breathes compressed air under pressure from

equal To the water around him/her. This means that the air entering the lungs is at the same pressure as the water. When the diver rises, according to Boyle's law, the air expands due to lower hydrostatic pressure [the shallower the depth, the lower the pressure], causing the lungs to over-expand.

When over-expanded, the lungs will not burst like a balloon, but will tear. However, tearing itself is not a problem because…

How does scuba diving lead to pulmonary embolism? was originally published on Spring