A couple of weeks ago my friend suddenly got very dizzy and then fainted. Ever since then whenever she would do any physical activity she would get extremly dizzy to the point where she could not stand up. Her face would get really white and she would start acting a bit weird. She would sometimes have some vision loss. She described it as being like a head rush. She also sometimes gets it randomly even when isn't doing physical activity. I was just wondering if anyone new what could be the problem.
Thanks