I have to wonder if any of you have had testing for gammopathies? In peripheral neuropathy some patients have elevated antibodies (proteins) in the blood which thicken it.
When thick it impairs circulation in the small blood vessels, and causes nerve damage and symptoms of pain, numbness and tingling. Muscles can cramp.

http://en.wikipedia.org/wiki/Monoclo...d_significance

There are also globulins that may thicken blood, and one type is called cryoglobulinemia which occurs when it is cold out.
http://en.wikipedia.org/wiki/Cryoglobulinemia
The photo does not represent all patients. Some do not get the skin lesions until late in the course.

All hyperviscosity problems can be made worse with eating high fat high sugar foods. This raises triglycerides and thickens the blood also and makes for poor circulation as well. There have been studies done on healthy volunteers who developed very thick blood after meals with high fat in them. This lasted for 8 hrs or more. (ice cream is a big offender ! )