Reasons for cats rolling in the litter box:

1. The litter box is large: When the litter box is large enough, cats will like to roll in the litter and will feel very comfortable.

2. Cats like cat litter: When cats like cat litter, they like to roll in it. It is recommended to change the cat litter to avoid contamination of the cat's hair with excrement.

3. Itching on cats: Cats may itch when they have skin diseases, and they need to go to the pet hospital for examination and treatment in time.