I have had skin sensitivity just above my elbow on the back of my arm for about 2 - 3 weeks now. It hurts to even lightly touch it. Now, within the last week or so, my arm has started to ache and the pain has gradually radiated down to my elbow. It doesnt feel like its muscular as it does not necessarily hurt to move it. It just randomly aches, along with the skin sensitivity. Does anyone know what this could be?