I have had a pain in the lower part of my left tibia about 2 inches long and 1 inch wide above my ankle for 2 months. I have no bruise or lump and does not hurt when I walk on it, just when I touch it. Also, for 2 weeks now, my left elbow is painful when I touch it or lean on it. Again, no bruise or lump and no previous injury. Now, for the last 3 days the base of my skull on both sides are very painful to even touch lightly, doesn't hurt unless touched and no bruises or lumps and no previous injury. What can this be??????