Few cases of iritis. saw rheumatologist; lots of blood work done. all fine, but hs crp levels were 2.6. what does this mean? what is crp?

See details: The CRP is a gross measurement of inflammation. In your situation it likely has no real significance.

May be primary: Iritis may be primary, but it is always important to look for an underlying cause. CRP is a protein elevated in the blood with inflammation, infection or disease (e.g., lupus) activity. Spondyloarthropathy and sarcoid still must be considered. Early ankylosing spondylitis may not be recognized on si x-rays and other forms of spondylitis may spare the si.