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Dizziness is generally relieved, not exacerbated, by lying down. However, if you have a condition called benign paroxysmal positional vertigo, you are going to battle dizziness while lying in bed. (BananaStock/BananaStock/Getty Images).
But if you have symptoms of low blood pressure, your doctor can diagnose the condition and uncover the cause. Symptoms of dizziness and lightheadedness when you stand up from sitting or lying down -- with a decrease in your blood pressure -- may indicate a condition called postural hypotension.A wide range of underlying conditions may also cause your symptoms.ymptoms of dizziness and lightheadedness when you stand up from sitting or lying down -- with a decrease in your blood pressure -- may indicate a condition called postural hypotension.