The reasons why cats always lick their anus:
1. Every time a cat urinates, it will lick its anus to clean it. Usually, the owner does not need to wipe the cat’s butt.
2. When a cat’s reproductive system becomes diseased and suffers from anal disease, the cat will lick its anus.
3. If the cat feels itchy during the estrus period, it will keep licking its anus. You can wait until the estrus period is over before taking it for sterilization.

4. When there are parasites in the cat’s intestines and the parasites keep biting the anus, the cat will keep licking it. The cat must be dewormed in time.
5. When there are fleas on the cat and they get to the base of the cat's tail, the cat will feel uncomfortable and will keep licking its anus. The cat needs to be cleaned with anti-worming and flea medicine.