Hi i am having psoriasis. recently i had blood test . everything is normal except 25 oh vitamin - 12.9 ng /ml e.s.r -20 mm/1 hr mchc 35 % can you suggest me something out of these figures .. is it a condition for arthritis ?

Labs: Lab results are meaningful only in the context of the person. High MCHC in a healthy person may simply be a problem with the calibration of the machine or reflect that reference ranges are set so that a few percent of healthies fall outside on either end. I'd ignore sed rate / ESR. You'll do yourself a huge favor if you address the vitamin D issue -- sunlight, diet, supplements.