The reasons why cats lick their fur:

1. When cats feel anxious or uneasy, they will also lick their fur to relieve their emotions and release stress.

2. When a cat is infected with parasites, causing skin discomfort and licking the affected area with its tongue, the owner should take it to the pet hospital for treatment as soon as possible.

3. If cats get along well with the same kind or have a quarrel, they will also lick each other's fur to express intimacy and repair the relationship.

4. If the cat’s body lacks vitamins, it will supplement them by licking its fur. The owner should feed the cat pet trace element tablets.

5. Cats love to be clean. They often clean their hair by licking their fur to keep themselves clean.