Hello. For the past week, my rightarm has had slight pain when I straighten it out and reach for something, almost like the muscle was stretching to the breaking point. Today my arm started hurting more and I can t straighten it out completely, I d say I can straighten to only about 145 degrees. From about 2 above the crook of my elbow down to my wrist it has been tender to touch for the past couple days. Tonight a red line has appeared that is about the width of my pinky finger. The line is running from my wrist to the crook of my elbow. The line is not raised, but it is tender to touch. (Not terribly painful, but very tender.) It doesn t seem warm to the touch.