Floor Bump . 90+ years of experience enables us to focus on innovation and developing high quality solutions for you. If your doing tile, you'll most likely have to add plywood subfloor to strengthen the floor. Bump In Hardwood Flooring? Flooring DIY Chatroom Home Improvement Forum from www.diychatroom.com The forehead and scalp have an abundant blood supply, and injury to these areas often results in bleeding under the skin. Sometimes you have to cheat a little and only get the worst of a hump and feather out the edges with patch. Head trauma from play or sports is a common concern for parents, but rarely does a bump on the head result in serious injury.