system
Given the following post, respond as if you're commenting on Reddit:
human
Does sweating empty the bladder?

Let's say you have a full bladder, but you hold it.  If you sweat a lot, will your bladder eventually empty?  Can some or all of your urine go back into your body to hydrate you?
gpt
Nope. Once you're dehydrated the kidneys will be producing urine that is more concentrated (and lesser in quantity). But the urine that has already been produced and is being stored in the bladder will not get reabsorbed.