Thank you! I have explored many issues with doctors already. I have had a complete blood panel done which ruled out anemia and other possibilities. I am only light headed when walking....not sitting, standing or getting up. Have been on blood pressure meds for some time.... beginning well before my surgery....no problems previously. BP is controlled ( I monitor most days) Surgeon said it might be residual anesthesia effects but it has been 5 months. I drink 8 - 10 glasses of water per day. I am sorry for lack of info before! Thank anyone for insights.