Limb lengthening surgery was once meant to fix serious bone problems, but now it is turning into a trend for people who simply want to be taller. Clinics in countries like the US, India, South Korea and across Europe are seeing more patients willing to go through months of pain just to gain a few extra centimeters. The process involves breaking leg bones, usually the thigh or shin, and slowly separating them so new bone can form in between. Metal rods or external frames are used to guide the gro