Acondition that affects the urinary system and can be fatal is

This can be fatal because if you are not able to get urine out of you that is not good because it is a person to the body. so it all depends what kind of problem you have that's what i think

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle