3 doctors weighed in:

Why coughing makes you pass out?

3 doctors weighed in
Dr. Lea Danielsen
Family Medicine
2 doctors agree

In brief: Vagus nerve

It is one trigger that leads to vasovagal syncope.
The vagus nerve can malfunction slowing the heart and dropping the blood pressure which results in a lack of blood to the brain causes fainting. Vasovagal syncope typically poses no danger. I wonder why you would be having such a violent cough, and you need protection from falling is coughing.

In brief: Vagus nerve

It is one trigger that leads to vasovagal syncope.
The vagus nerve can malfunction slowing the heart and dropping the blood pressure which results in a lack of blood to the brain causes fainting. Vasovagal syncope typically poses no danger. I wonder why you would be having such a violent cough, and you need protection from falling is coughing.
Dr. Lea Danielsen
Dr. Lea Danielsen
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