Some people (especially children) can regrow their fingertips if they are cut off. This is really weird. It only happens if the finger is cut above the base of the nail. Scientists think there’s a type of cell at the base of our nails that helps it regrow. We’re unsure why sometimes fingertips regrow and sometimes they don’t. Age appears to be a big factor, as well as how much of the fingertip was cut off.