Why is it that sometimes when i urinate i get the shivers – quora t gas terengganu

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More often than not the shiver or trembling the body goes through during or after peeing occurs after you have held on to the urine for quite a long time before finally releasing it. The shiver normally occurs after urination or moments before the urination ends. The shiver starts in the spine and rapidly moves all over the body, causing the entire body to shudder briefly.

• According to doctors, one of the likely reasons is because the body’s temperature quickly gets lowered after we have released enormous amounts of warm fluids from the body in the form of urine. As a result of this, the body’s protective mechanism quickly causes the body to shiver in order to bring some warmth back to the body. This is the same thing that happens to the body when we are very cold – the body begins to shiver in order to bring some heat back to the body.

• Another reason some people might experience pee shakes is likely because of a simple thing such as the fact that when a person wants to urinate, they expose their private parts to the cold air outside. As a result of this, the person naturally feels cold and shivers during or after urination.

• Also because of something called the shiver reflex. Our parasympathetic system tends to simultaneously lower blood pressure while initiating the bladder contraction (sacrum plexus). Hence in order to counter that, our sympathetic system initiates a shiver reflex to counter this drop. Men tend to experience it more since blood pressure is higher when standing and hence the drop will be significant.( hope I have not offended you. Great answer btw!)

One proposed reason is that our body loses heat after urination, especially after release of a large volume of urine. Some argue that urine is insufficient to lower our body temperature significantly, and list examples where we do not shiver after losing body mass, such as when vomiting or defecating.

Urine, being in thermal equilibrium with our body after being stored there for a long time, does not cool our body down when leaving it. However, urine being mainly made up of water, has a very high specific heat capacity. The loss of a large mass of water from our body can lower our body’s heat capacity and in turn increase the rate of cooling of our body by cooler surrounding air, hence leading to a lower body temperature (about 1 °C). Vomit and faeces have a lower heat capacity than urine as their composition by water is lower, coupled by the fact that their mass is smaller than that of a bladder full of urine, which further agrees with the phenomenon of pee shivers occurring after release of a large volume of urine. Vomit occurs through the oesophagus, which is biologically adapted to sudden changes in temperature through eating and drinking. Hence the absence of shivers after vomiting does not necessarily disprove the theory of heat loss causing shivers.

I agree that the sudden change in temperature, instead of the magnitude of change, causes our involuntary nervous reflexes which may be more significant and observable in a standing up posture. The fact that we experience coldness when first sitting on a toilet seat may also prepare the lower part of our body for a sudden temperature drop, hence the rarity of pee shivers among women. Women are also better at conserving core body temperature than men, hence they may not need to shiver in order to produce more heat from the muscles.

The theory I find most convincing is that it is caused by the body trying to restore blood pressure which drops when we initiate urination (which is why men experience them far more often than women since blood pressure is higher when standing as opposed to sitting)

According to Sheth, our parasympathetic nervous system (responsible for “rest-and-digest” functions) lowers the body’s blood pressure “to initiate urination.” One leading theory behind the shudder is that peeing can unleash a reactive response from the body’s sympathetic nervous system (which handles “fight or flight” actions).

On the cellular level, the body is theoretically flushed with catecholamines (which you know better as chemicals like dopamine or hormones like adrenaline). Those are dispatched to help restore or maintain blood pressure, Sheth says. But the microscopic energy bullets “may also trigger the shiver reflect.”

• It’s all the fault of the parasympathetic nervous system. The parasympathetic nervous system is up there with the Babylonians as the default explanation for anything you can’t think of a good reason for (e.g., photic sneeze reflex, closing your eyes when you sneeze), but I throw it in for the sake of completeness. Your mini-orgasm theory sounds like a baroque version of this.