Hi sir i have these issues when i consulting siddha doctor they said i have low blood volume i have symptoms like all time fast heart rate dizziness sometimes fainting mental confusion difficult to concentrate memory issues loss of appetite sleeping all time too much tired Short breath Weak pulse Numbness often Low BP many times goes beyond very low But i have haemoglobin 14.6 All test report are normal when i go for Jogging i felt everything okay sir for q hr then again body back to normal