Cats don’t speak, which usually means they just glare in contempt at their human servants until they get the service they demand. However, since cats can’t speak, they also can’t tell you when they’re in pain or ill. As cats get older, they can suffer from arthritis.
Signs of arthritis pain in cats include hiding and decreased ability to climb. If you think your cat may have arthritis, get it checked by a vet. That way your cat can enjoy its life free from pain, which will give it more time to inflict more pain in your own life as you get older.