A cat's whining may be caused by estrus, injury or other diseases. You should pay attention to the cat's physical condition. When the cat is in estrus, if you do not consider mating, it is recommended to take it to a pet hospital for sterilization as soon as possible. If the cat is not healthy If there are other wounds, they should be treated promptly or taken directly to the pet hospital for examination and treatment to avoid worsening of the condition.