Like humans, cats have their own thoughts. Changes in the environment or setbacks caused by the owner's mistakes can cause emotional fluctuations in cats, affecting their physical and mental health. Damage to physical and mental health is a gradual process. When it accumulates to a certain level, coupled with some stimulation, the cat may become ill. 
Signs of psychological distress in cats:
1. Chewing wool fabrics
Some Oriental cats, especially Siamese and Burmese cats, sometimes have a particular fondness for chewing wool sweaters or other knitted clothing. This reversion to kitten-like behavior is also a result of some form of repression.
2. Aggressive behavior
If a normally gentle and affectionate cat suddenly changes its temperament, scratching and biting its loving owner, this unusual behavior must have a reason. It's very likely the cat is unwell and should be taken to the vet. Sometimes cats also act out of frustration, scratching furniture and tearing clothes.
3. Neuromodification
Some cats, when under stress, will become excessively picky about their fur, licking and chewing incessantly on certain areas for no apparent reason. This often leads to dermatitis, eczema, or even baldness. In cases of this behavior, veterinarians may administer sedatives to alleviate the cat's anxiety and stress.
4. Indoor signage site
Certain changes in daily life, or the arrival of a new cat in the home, can bother and upset him. In such cases, he may urinate in the house. The wet areas should be cleaned with disinfectant to remove the cat's scent and prevent him from returning to the same spots to urinate.
5. Anxiety
Anxious cats appear nervous, crouching low on the ground. Some may pant or shed fur, their muscles are tense, and their pupils are dilated. These are all common signs of anxiety in cats.
Cats communicate by scratching, and it also helps them maintain their claws. Therefore, in a cat's living environment, provide at least one scratching post and some space nearby for the cat. Train the cat to use the scratching post. If the cat doesn't learn to use the post, she will find other alternatives in the room. 
How can I keep my cat healthy both physically and mentally?
1. Food
Indoor cats, who don't have to hunt for food, can become bored and obese. Owners should train their cats to perform small tricks that are praised and rewarded with treats. Throw the treat and let your cat chase it. You can also consider placing small portions of food in other locations for your cat to find on its own.
2. Space
Creating vertical spaces can make your cat happier. Cats love to jump to high places and look down. Jumping also keeps them active. A tall perch can achieve this. If two or more cats live in a small space, climbing frames and perches can provide more space and reduce stress caused by limited space.
3. Litter box
The location and cleanliness of the litter box have a significant impact on a cat's psychology. The primary reason for cats urinating or defecating outside the litter box is that its location and cleanliness are unsuitable for the cat. Many cat behavior experts recommend that every cat have its own litter box.
4. Games and toys
While cats may become less playful as they age, play remains a vital way to maintain their mental well-being. Many cats can play with toys on their own, but interactive play with their owners is crucial for their mental health. The ambush, chase, and bite behaviors in play can alleviate boredom and provide physical exercise. Don't give up on playing with a cat that doesn't seem interested; owners can gradually find toys that interest them (like feathers or laser pointers) to play with.
Finally, the most important thing in caring for your cat's physical and mental health is to let your cat feel your love, maintain effective communication with your cat, provide the help it needs, and give kind reminders and corrections when it does something wrong. In this way, your cat will grow up healthily.
