Hi, Thank you for posting your query. I have noted your symptoms. Based on the description, we need to exclude postural hypotension- a drop in blood pressure on sitting up or standing from lying down position. This can be confirmed by checking blood pressure in lying down and in standing position. We also need to exclude anemia- a deficiency in haemoglobin. I hope my answer helps. Please get back if you have any follow up queries or if you require any additional information. Wishing you good health, Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology) Senior Consultant Neurologist Apollo Hospitals, Hyderabad, India Click on this link to ask me a DIRECT QUERY: http://bit.ly/Dr-Sudhir-kumar My BLOG: http://bestneurodoctor.blogspot.in