I feel run down like I am sick with the flu nauseaous, dizziness and body aches but no headache yet could this be a shunt problem or just the flu?

Doubt shunt. If it came on all of a sudden, it's probalbly not due to your shunt. You are sick. You may have the flue. see a doctor to have them check you out. Specially if you didn't have the flu shot.

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