I ve been having pain in my lower back, upper legs, upper arms and lower part of back of my head for about 2 weeks. I am a 69 year old woman, generally in good health and do zumba, ride bike and walk. I have never experienced pain like this for this period of time. It is better during the day when I m moving about, but if I sit too long or during the night it worsens. Could this be something with the muscles? Any thoughts regarding this? I will be seeing my family doctor when I return home end of February.