Reasons why cats urinate indiscriminately in the house:
1. The cat may be experiencing significant stress, leading to urinary tract abnormalities. For example, introducing a new cat, moving the litter box to a new location, or switching to new cat litter can all cause significant emotional changes in the cat, resulting in urinary system problems. Owners can use cat-specific mood stabilizers at home and try to avoid stressing the cat, which may help.
2. It's also possible that the cat has a urinary tract disease, such as bladder or urethral stones, cystitis, or kidney disease, all of which can cause similar symptoms. It is recommended that the owner take the cat to a veterinary hospital for a urinary system examination.
3. Finally, it's also possible that the cat is in heat, especially male cats. During their heat cycle, they will use urine to mark their territory, so they will urinate everywhere in the house. 
Solutions for cats urinating indiscriminately at home:
1. Scent Removal Method: This is the primary and most important task in solving the problem of cats urinating indiscriminately. Removing cat urine is not only related to the owner's home environment, but also to whether the cat will recognize this spot and urinate there frequently.
2. To prevent inappropriate urination caused by dissatisfaction with the litter box environment, cat owners should try to choose the litter box style and litter scent according to the cat's preferences. Generally, most cats prefer open litter boxes and unscented litter. The placement of the litter box is also important; try not to place it too close to the cat's food bowl or bed.
3. Spaying/neutering at the appropriate age is a good solution for cats that urinate inappropriately due to being in heat.
4. Seek medical attention promptly if your cat exhibits symptoms such as sudden inappropriate urination, decreased urine output, frequent urination, or blood in the urine. Take your cat to the vet immediately to check its urinary system. Don't delay seeking medical help.
5. For cats that intentionally urinate indiscriminately, owners must provide timely positive education, such as taking the cat to identify the crime scene and then giving it a small punishment, such as scolding, withholding treats, or putting the cat in a cage for ten minutes to reflect on its behavior.
