• pixelscript@lemm.ee
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      2 hours ago

      Piss is blood, in a sense. It’s the bits of your blood that get sieved out and rejected by your kidneys.

      Normally those are the only bits supposed to be getting out. But if the filter is busted (kidney trouble) or if the walls of the storage tank it sits in after filtering become damaged (bladder trouble), you can end up pissing actual, unfiltered blood.

      Alternatively, you ate something recently with a strong red pigment that can survive digestion, enter the bloodstream, get strained out by the kidneys, and collect in your piss in high enough concentration to turn it red. Beets are a pretty famous culprit.

    • _bcron@midwest.social
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      3 hours ago

      Not only bladder cancer but a whole bunch of things. I used to run home from work and I would always pee right beforehand so I wouldn’t risk having to find some sort of place to pee, but then I started peeing blood every couple of weeks when my mileage went up to around the 10 mile mark. Apparently hematuria can happen from basically having a totally empty bladder chafe itself raw if you run long enough lol. I quit peeing before leaving work after my doctor recommended giving that a shot and it cleared up

    • Asafum@feddit.nl
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      14 hours ago

      Yeah I’m pretty sure that’s a key sign of kidney failure. It can happen rarely in cases of some crazy workouts, but if this dude is saying all the time then it’s probably something worse.

      • Catoblepas@lemmy.blahaj.zone
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        13 hours ago

        Also could be a UTI or STI(s). Or he eats beets all the time and isn’t particularly bright. Could be anything, spin the wheel of medical disasters!

        • evidences@lemmy.world
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          9 hours ago

          Friend of mine had strep throat as a kid and it somehow ended up infecting his kidneys causing him to piss blood, he’s fine now.

      • jws_shadotak@sh.itjust.works
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        14 hours ago

        It can happen rarely in cases of some crazy workouts

        If anyone’s curious about why:

        Muscles break down during workouts. They release myoglobin, which is a large protein. The kidneys can usually filter it in small quantities.

        If you go too hard and give yourself rhabdomyolysis, your body releases a large quantity of myoglobin and it overloads the kidneys. Large proteins begin passing through the nephrons en masse and damaging them because they’re too big.

        Now your kidneys are unable to filter properly because the nephrons cannot contract to prevent excess fluids or particles from going into your urine.

        • drosophila@lemmy.blahaj.zone
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          7 hours ago

          Large proteins begin passing through the nephrons en masse and damaging them because they’re too big.

          Just in case this isn’t enough warning, note that this can permanently reduce your kidney function and harm your body in other ways as well.

          I know it’s very unlikely for anyone here to do this, but if this happens you aren’t just having a “crazy workout” you are giving yourself an injury and possibly permanently affecting your future health. So please don’t exercise until you piss blood.