sThe nail bed’s anatomic structure is arranged in longitudinal grooves and ridges, when there is a small amount of bleeding within one of these grooves, the overlying nail plate traps the blood. The nail bed is linear in its construction so the blood takes on the appearance of a straight line. Eventually small clots form and the bleeding stops.Thankfully, there is no pain or discomfort associated with splinter hemorrhages, other than the initial trauma that may have caused it, if that is the case. The only way you can tell you have a hemorrhage is by a visible red stain under the nail plate.If the splinter hemorrhage is the result of another condition such as Raynaud’s disease, for example, then there may be discomfort as a result of that particular condition or disease.