I'm 56, female and was diagnosed in early 2008 and at that time had a myriad of symptoms, all that we were able to get under control with a short course of Prednisone to address the intial swelling and an ongoing course of Plaquenil to keep the Lupus at bay. I do however get "flares" from time-to-time, but by keeping my stress down, they seem to be less frequent and not as intense as they initially were. (This has really been annoying....as I used to bodybuild and miss being able to lift weights, but my joints tell me they don't like it....sigh).
About 2 months ago I woke up one morning and felt as though I'd been hit across the left buttock with a 2x4 and the pain ran right down my leg to the calf area. It was a 6 on a scale of 1-10. As I had an appointment with my Rheumatologist later that week I waited to check with her. She stated that she thought I probably had "facet joint syndrome" (the little joints between the vertebrae and the discs in your back. She further stated that most people, as they age, will experience some "wear and tear" on the boney structures of the back, but in my case there was probably some pretty pronounced deterioration of the joints and this is what would be causing my "new-found" aches and pain. She also told me that there really wasn't anything that could be done and that I could expect it to get worse.....she was right. I now have pain alternately between the right and left hips, down the legs and into the ankles.
It might be worthwhile to request an xray of the lower back and hips, specifically the are of the L4-L5 and L5-S1 joints, they'll be able to see changes quite easily and determine if osteoarthritis is a factor in the pain picture.
There are some basic things that I do to eleviate pain at night:
1) make certain you have a really good mattress (proper support is crucial)
2) try using a body pillow and either lying on one side or the other, hugging the pillow the length of the body (sort of draping a leg up over the pillow) to take the pressure off the lower back
3) try tucking pillows under the knees when lying on your back, causing the small of the back to flatten out more to the mattress, creating the proper pelvic tilt
4) WEIGHT......that's a really important factor. If one can ensure they are at a reasonable weight for their body frame, this is a huge part of the puzzle. As joints are so compromised with any autoimmune condition, it's really important to take as much stress off them as possible, and....last but not least
5) Do anything that you can to de-stress....I know that may sound easier said, than done...but if you can find something that helps shift your focus from the pain - listening to soothing music, sounds of rain or the ocean, something like that to help you move into a more relaxed state while in bed can really help the brain chemicals that transmit the pain messages to the brain.