Hi. Actually its not regarding to me actually my friend her age is around 19. And she usually suffer from fever like twice a month. Although she'll be suffering from cold now and then. She had concerned to doctor a couple of time, but still the condition is the same. And her blood reports are all normal as so far. And the doctor has requested to start YOGA. And one more she usually have a headache problem. So as far, what is the reason for this & and by what way she could be better. And for any food or any exercises or any other thing please let me know. Thank you.