A member asked:

My brother almost passed out two days ago. he complained of dizziness and profuse sweating. there is a family history of hypertension and diabetes.?

2 doctors weighed in across 2 answers
Dr. Rick Koch answered

Vasovagal?: Most likely vasovagal in younger person but getting evaluated would provide reassurance.

Answered 11/11/2012

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Dehydration: Dehydration is a frequent cause of dizziness. As dr. Koch stated, this can lead to vasovagal symptoms.

Answered 11/9/2015

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