A cat meowing by itself may be caused by hunger, illness, estrus, injury, etc. The owner should pay attention to the specific situation of the cat. You can prepare some toys and snacks for the cat to divert the cat’s attention. If the cat is If the cat is in heat, the owner needs to consider whether to let the cat mate. If he does not want the cat to mate, he should take the cat to a pet hospital for sterilization surgery as soon as possible to avoid prolonged suffering.