Miasmatic theory, as it was called, was a widespread belief among members of the medical profession (and the public) in the 19th century. This might sound obvious, but the belief that disease came from breathing in air infected by corpses was once common. There's no science to back up the idea that a dead and decomposing body is harmful to the living just by virtue of its being dead. "Goosebumps caused by the contraction of the hair muscles can add to the effect." 2. As for hair, drying skin on the face and head "pulls back towards the skull, making stubble appear more prominent," writes Claudia Hammond for the BBC. When a dead body's skin loses hydration, it retracts-and retraction along the nail bed makes it appear as if the nails are getting longer. It does look like things keep growing, though. Not true! The cell division driving hair and nail growth stops when the body dies and the heart no longer pumps oxygen-filled blood throughout the circulatory system.
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