...Dr. Bailus Walker, an environmental and occupational medicine expert at Howard University Medical Center, says one concern is the effect the barometric pressure will have on their bodies as they're brought up. " You'll see muscular aches and pains in the joints called 'the bends' as a result of the decompression. You could see some respiratory difficulties called 'the chokes.' You'll see increased blood pressure, and some lung damage–but the adequate supply of oxygen should keep lung problems at a minimum."