I'm not a doctor or any medical person of any kind but i may know a little about this through experience of my own. My nails grow around 2 millimeters a week but how I think you can make them grow...
some people sniff coke out of it....pimps tend to grow becuz its just pure pimpin or cuz they just coke heads......and some just do it for their love of their pinky nails....like me