Neurological effects of dehydration can cause irritability. Luga Podesta More Quotes by Luga Podesta More Quotes From Luga Podesta When you're dehydrated your blood pressure drops, heart rate increases, blood flow to the brain slows -- all of which can make you tired. Luga Podesta top-news This occurs because your body starts to limit blood flow to the skin. Luga Podesta top-news