Dizziness: What you are describing is called near-syncopal episodes,the most common cause is vasovagal. it happens when a person stands for long period of time, during emotional distress, sight of blood and etc. Blood pressure drops and blood supply to brain decreases. Vasovagal syncope is usually harmless and requires no treatment. But your doctor may want to rule out more-serious causes of heart dx.
Answered 9/29/2016
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