Can taking magnesium cause muscular and joint pain?

I don't know...but I can tell you that I have tried taking a magnesium supplement for my fibromyalgia pain, and everytime I take it I feel WORSE the next day!!!

I have no special diagnosis, but Magnesium supplements (even at low levels) attack my joints in a crippling way. I've added it to my allergy list along with Statin drugs.. including Niacin. I've been treated with Cortisone for bursitis: Shoulders, hips, elbows, even my heel. At one point they were treating me for Fibromyalgia. It was, I believe, all caused by Magnesium. I was young when it started. At around 60, somebody told me I need more Magnesium in my diet to help with constipation. Soon the pain attacked. I had to lift my left leg to get into the car to drive to the University of WA. Their drs. treated me again for bursitis, but the pain soon came back. (I remembered then that I'd been through the same thing a few years earlier, at a time when I simply had to work through the pain. At that time I ran out of supplements, and suddenly realized I was pain-free.) After my trip to the UW, I quit taking the extra Magnesium, and the pain was gone within two days.