In the atmospheric pressure present at sea level, water boils at . At an altitude of , it boils at only , the normal body temperature of humans. This altitude is known as Armstrong’s Line. In practice bodily fluids do not boil off at this altitude. This is because the skin and outer organs have enough strength to withstand this pressure, thus pressure inside the body would be significantly higher—however, nitrogen bubbles are starting to form, creating a hazard.
Ebullism
Enamel pearl
Black hairy tongue
Omphalolith
Hamartia 
Aphalangia
Amastia
Caviar tongue