Sounds like a urine infection to me. If so its unpleasant but they can give antibiotics which soon clears it up. Have fun administering them though.I gave them in its food so the cat stopped eating all together , placed them in its mouth (vets idea) got bitten and scratched ,crushed them up and put water with them and squirted into its mouth and it expelled them by blowing pink foam out the side of its mouth !
The syringe method finally worked soon as I mastered the technique.........