question: the tip of the index finger of my left hand (I am right-handed) has been overly sensitive to pressure. When I use my hand normally, my fingertip feels like I hit it with a hammer. When I rest my hand, the pain subsides in about an hour. I ve also been waking up with pain in this finger. It feels slighty warm and I can see a very faint, small, light red mark under the skin of the side of the fingertip. I don t recall injuring or over-using my hand or fingers recently