In His Grip
AlwaysRosie "We can't control the waves, but we can learn how to surf!!"
Co-Moderator - Lupus Forum
UCTD, Hashimotos, Inflammatory Bowel, Inflammatory Arthritis
Clickable Links: Lupus Resources Lupous.Org Lupus Criteria (4 of 11) Lupus Chapter Locator
One of the main reasons my diagnosis was changed to RA was because my joints were doing as you described. Mine are bad in the mornings, then get better, then in the early evenings they start hurting and stiffening up again. Most evenings I won't sit down until 8pm or so because if I do, I know I won't be able to get back up. I will stiffen up and my joints get sore quickly. I have more issues with swelling at the end of the day rather than in the mornings.
As for your back, RA doesn't affect it. It does affect your neck & hips though. Another thought is that if your gate changes due to knee (or hip) problems, your back will give you trouble.
It's definitely something to bring up to your doctor. I hope you feel better soon!