Why does blook pressure go down?

Answer:
Sorry do you mean why do some people have low blood pressure?Generally low BP is healthy, Exercise and weight loss will lower BP, and reducing salt intake may have a minor lowering effect. It may be lowered by some drugs used to treat other conditions, for example alpha blockers for benign prostate disease lower BP. Also sometimes after a heart attack or stroke BP will fall.

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because your heart doesn't have to work as hard to pump blood through your body.

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A decrease in the resistance of the flow blood.Arteries relaxing (Hormone related) decrease in stress,blood loss,decreased hydration.. to name a few reasons.

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Try a search on Wickipedia they can answer nearly all questions.

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Whats "blook"?

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How far down? Exercise and intake of fluids and salt intake often affect your blood pressure. If it is persistent and gets really low, see your doctor. Low blood pressure can kill or harm you just like high blood pressure can.

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