Israel Sjogren's RA and Raynaud's

Israeli research on Sjogren's and RA. Sixty Israeli patients, 30 with primary Sjogren's syndrome, and 30 with rheumatoid arthritis RA and secondary SS were evaluated and they found that Raynaud's phenomenon was more common in primary Sjogren's.

http://link.springer.com/article/10.1007%2FBF02242939

Physiological conditions, Raynaud's is a vascular condition and people can experience it in different levels of severity depending upon the condition of your blood vessels, and it happens when there is a decrease of blood flow to the different regions of your body. When the oxygen supply is depleted the skin can become blue. Apparently, it is also accompanied by swelling.

https://en.wikipedia.org/wiki/Raynaud%27s_phenomenon

https://www.youtube.com/watch?v=1yulW3myy1o