Blood in urine and stool is serious. What can you do? Take him to the vet. There is absolutely nothing you can do at home, unfortunately.
The problem may be a combination of crystals in urine and worms. The cat needs more wet food and water. Also, if I'm correct with the idea of parasites in the stool, kitty needs to be dewormed, so the vet is your only choice right now.
Crystals are very painful for kitties and because of this they stop using the litter box, which creates more problems. Your cat needs to be on antibiotics and a diet high in water content. Make sure kitty is drinking a lot of water. You don't want to be in the presence of kidney stones either, so it's best to take the kitten to the vet right away.
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