Luckily, my cat does not suffer from medical issues. Her inappropriate elimination mostly lies in the unpleasant litter box. Therefore, I do some research and come up with some useful tips as followed:
Make sure the litter box is as clean as possible. Scoop the litter at least once a day. Rinse the box with unscented soaps or baking soda once a week.
Choose a large and uncovered box with multiple escape routes to allow easy access for your cat.
Choose a quiet position that protects your cat’s privacy. Do not put the litter box near where he/she eats and drinks.
Use only a thin layer of litter (less than two-inch depth). Fine-grained and unscented litter is favored by most cats.
There should be at least one box per level of your home.
Make sure that your cat lives in an enjoyable and happy environment. Try to maintain it as cats can point out even the slightest change.
Clean the area where your cat eliminates with an enzymatic cleanser. Use a plastic sheet or foil to block it off for a few weeks.
Always keep an eye on your cat’s behavior. If it suddenly becomes strange, consult a vet as soon as possible.
For houses with multiple cats, prepare an extra box and one litter box for each cat. Place them in separate positions.