Sjogren's Syndrome Support Group
Sjogren's syndrome is an autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva. It also associated with rheumatic disorders such as rheumatoid arthritis, and it is rheumatoid factor positive in 90 percent of cases.

Take care!
Also want to make sure that you have good leg circulation. If there is a question, they can do an ultrasound to check for any partial blockages.
There are meds that help with circulation if there is no obstruction. I know several folks who have had great results, although I can't actually remember the name of the medication right now.
I hope you find some answers - quickly!!
Debbie
My arms are the same when I have to raise them above my head.
I go to a hydrotherapy pool to keep my muscles strong around my knees as I also have osteoarthritis in them.