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Answer Wiki. As John suggests, divers that ascend too quickly can get an air embolism. Bends (decompression sickness) is slightly different and requires a diver to have been at some depth breathing a nitrogen mixture for some time. You can get an embolism even if you havenât been down long enough to need decompression stops.
1 The same principal applies to divers when they get the bends. If a diver returns to the surface too quick, dissolved gases in the blood expand and form bubbles, which can get stuck in capillaries and organs. 2  If you blow bubbles underwater, they expand as they rise to the surface.