It may be the cat's paw pads. If you look closely, you will find that the cat's front and rear paws have four pads, and the other pad is above and inside the cat's paws. Furthermore, it may be caused by external influences or diseases. , the owner can apply anti-inflammatory drugs on it and wait for a period of time to see if it gets better. If it does not get better, it is seriously recommended to send it to the pet hospital for examination and then prescribe appropriate medicine.