<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am a 48 year old female,in very good health ,good fitness level..BP and heart have been checked and are normal, ENT fine, not suffering from anaemia or diabetesall bloods came back normal but for over a month have been experiencing intermittent light headedness combined with heavy and sometimes tingling limbs  <response>: You may be experiencing either alterations in blood pressure control referred to as ORTHOSTATIC HYPOTENSION or you may be suffering from the earliest stages of nutritionalmetabolic deficiencies such as Vitamin B12, folate, vitamin D, or Magnesium. I would get all of these looked at through specific blood tests before embarking upon treatment because you dont want to be wasting time and money treating things that are not a problem, make sense? You could also be suffering from a mild urinary tract infection which may seem almost absurd for the symptoms, but one thing Ive learned long ago as a doctor...and that is...there is always a reason why the MEDICAL TV programs always talk about getting urine tests on everyone...and thats because youd be absolutely floored by the variety of conditions, symptoms, and sensations people can very quickly get rid of once they treat a mild urinary tract infection that they never suspected they had if not for their doctor just following the same recipe guide as the guys Greys Anatomy do! LOL!! Those are my opinions based upon your limited history. Please rate this a 5-STAR ENCOUNTER and write to me at: Chat Doctor. 