This will sound really weird, but I have had a soreness on my left side near my waistline for almost a week. My skin is very tender and sore to the touch,but there is no pain associated with it. There is no redness, swelling, no fevers, nothing other than the soreness. This is starting to concern me, but what could be the cause of this? I have looked on Google and fibromyalgia has some of these symptoms. Any suggestions or thoughts?