Hello Doctor, My Mother has been experiencing dizzy spells and heavy head since mid 2015. The only thing she did differently before then was long distant flight. She said she was scared in the flight and could not sleep all through and she travelled alone. She has since gone for different tests and scans and no one has correctly diagnosed the cause of this symptoms. Please help me as I do not want my mother to die. What does she need to do? No the: she has been on medication since being diagnosed of high blood pressure and blood sugar in 2009.