I agree with all of the posts that you need to see a Rheumatologist. I noticed in your signature that you had been on Remicade prior to surgery. Remicade can cause "Drug Induced Lupus". I know because it happened to me. My symptoms started like yours, in about the same area, and soon I had the most horrible, dark purple, itchy rash all over my back, chest and the trunk of my body (which by the way left permanent scars all over my back).
A Rheumy will run a multitude of tests to diagnose you - an ANA is just one. My Rheumy ran 14 specific blood panels when I first saw her one year ago - all 14 came back positive for things ranging from positive ANA, RH Factor, Cryofrinigens, Cryoglobulins, etc. In short meaning I tested positive, in every way, for Lupus and Rheumatoid arthritis.
The good news is that in most cases after cessation of Remicade the symptoms of Lupus and arthritis will go away. Last week my Rheumy ran the same 14 blood panels as she did one year ago -- and good news! I am now only positive for Cryoglobulinemia - which causes "Raynaud's" syndrome and other problems - but this too may go away with time.
Remember it took me a full year after being taken of Remicade for the symptoms to stop and the blood work to normalize.
Moral of the story? Let a really good, "vampire-like" Rheumatologist go to town on your blood work!
"I come from the suburbs. You know the suburbs? It's where they tear out all the trees and name the streets after them." David Lee Roth
Male, Age 40
Diagnosed with Pancolitis, August 2005
Diagnosis changed to Pancolitis not including Sigmoid colon, rectum Jan. 2006
Past drugs: Azathioprine, Asacol, Remicade, Humira, Cimzia, Methotrexate, Prednisone. All had side effects or stopped working.
Currently suffer from drug induced Lupus, Raynaud's, Cryoglbulinemia and mild arthritis - all attributed to use of Remicade.
April 2010: underwent total colectomy with ileorectal anastomosis with temporary loop ileostomy. Awaiting take down.
Current meds: Rowasa enemas, 10mg prednisone/day