Suggestions to stop nipping?

Depending on what's being nipped... Don't associate things like fingers/hands/feet/toes with play. Learn to recognise your cats physical actions just before nipping takes place, and try to stop it before it starts. In a better context, if stroking your cat leads to purring, but stroking your cat with a heavy hand leads to nipping/pawing at your arm, clearly there's an obvious message. It could also be a result of over excitement, what's the cause of excitement? Play? Other pets? Could the nipping be related to the cat being touched in a sensitive or painful area, bruised maybe? There are many possibilities. Without more specific details it's hard to give a more accurate response.

How old is the cat? Kittens tend to nip more than an adult cat. Are you interacting with the cat with toys? Cats love to play! Utilize toys instead of fingers. Most cats don't enjoy people touching their bellies (although my Raiden loves his belly rubbed), so if that's off limits with your kitty, don't touch! Petting a cat too much can cause over stimulation and they may bite at you! Kittens especially love feet and will attack as you walk by them. It simply means they want to play, so spend more time playing with your kitty and wear the poor thing out and this should stop.

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The little monsters 3