I have been having flushing for 8 months now and had all my tests done. Tests from last month CBC normal, Bone Marrow normal for Mastocytosis,Lukeumia,Lymphoma. CT of Chest,Abdominal and Pelvis normal. Polycythemia Vera (C3,C4) in range. 5-HIAA, Seratonin in blood in range. Chromogranin A is 8 ( Normal high is 6). I had a colonoscopy in 2010 and Endoscopy last month both normal. I am on Proton Pump Inhibitor for some time. I recently had a full body Bone Scan normal. Do I need to get a Octreotide Scan to rule out Carcinoid tumor due to severe flushing of face,palms,legs and abdominal region and weakness with some heavy breathing I do not understand what is going on.