It is common for an unremoved splinter in the hand to eventually turn into a corn. This occurs because if the splinter is not removed, it causes the body's tissues to reject the foreign object. This rejection leads to the formation of local tissue scars around the splinter, which can subsequently develop into a lump that resembles a corn. As long as the splinter remains in the body, the lump and scar will not disappear. Therefore, surgical intervention is necessary to excise the scar tissue formed under the corn to ultimately heal this condition.