The Straight Dope
What causes a person to shiver uncontrollably following urination (i.e., “piss shiver”)? My friends and I have wrestled with this for years even to the point of consulting medical authorities (they didn’t know either). We currently have two theories. One is the Rapid Heat Loss Theory, which states that an uncontrollable shiver passes over the body following the rapid loss of several ounces of 98.6 degree liquid. This theory seems to have good face validity, but as far as we can tell females do not experience piss shiver, which puts a hole in that idea....