7 doctors weighed in:
After I have sex I shake and feel nauses why does this happen?
7 doctors weighed in

Dr. Dennis Higginbotham
Obstetrics & Gynecology
6 doctors agree
In brief: Vagus nerve effect
Intercourse can stimulate the part of your nervous system (the vagus nerve) that controls nausea, shivering, sweating, pulse, and blood pressure.
You could experience the symptoms you describe, as well as feeling lightheaded and queasy - some women would pass out briefly when the pulse and blood pressure drop enough from this stimulation. These symptoms are usually transient and harmless.

In brief: Vagus nerve effect
Intercourse can stimulate the part of your nervous system (the vagus nerve) that controls nausea, shivering, sweating, pulse, and blood pressure.
You could experience the symptoms you describe, as well as feeling lightheaded and queasy - some women would pass out briefly when the pulse and blood pressure drop enough from this stimulation. These symptoms are usually transient and harmless.
Dr. Dennis Higginbotham
Dr. Dennis Higginbotham
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