Involuntary response: Pain or even the anticipation of pain can cause a temporary imbalance of the autonomic nervous system which normally keeps the heart rate and blood pressure within a certain range. With too much negative influence the heart rate and blood pressure both decrease enough to cause a temporary fainting episode. As the heart rate and blood pressure come back up normal consciousness returns.
Answered 5/13/2019
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Nasal splints: You fainted because you had a vasovagal reaction. Your heart slowed down a bit and your blood pressure came down as a result of pain and aprehension. It is quite common.
Answered 7/20/2015
5.7k views
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