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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Could Fainting Be Due To Poor Blood Circulation Or Low Blood Sugar Levels?

I have had 3 episodes of blacking out, but they are spaced 3-4 months apart and seem completely random. Every time it has happened I was about to eat dinner and hadn t eaten for several hours. I also had been sitting on the couch for a long time before getting up to help with dinner. Wondering if maybe it could be either poor circulation or low blood sugar? It starts out with me feeling very weak and hungry, then my extremities start tingling and I break out in a sweat all over my body. After that, my vision gets very blurry and my ears start ringing very loudly. Then I blackout completely. After I come around it takes a while for me to feel normal again. One thing my husband notices when it happens is that my pupils get very big, but they go back to normal after I start to feel better. The reason I think it might be poor circulation is because I have always had problems with leg pains and cramps for as long as I can remember. Especially at night when I m sleeping or if I have been sitting for a long time. The blackout episodes happen very quickly and I have almost no warning time before I pass out. I have had an EEG, EKG, MRI, CAT scan, and all came back normal. Is this low blood sugar? poor circulation? or something else?
Mon, 13 Oct 2014
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General & Family Physician,  's  Response
Hello
You mentioned that these episode occurs at once without any warning , reasons are so many , these include:
1 Hypotension or hypertension , diagnosis can be confirmed by examination ( 3 -4 hours after this episode ).
2 Hypoglycemia or hyperglycemia as low blood sugar as well high blood sugar also produces such fainting.Get in HBA1 C and blood sugar level .
3 Brain tumor , this is one such cause , so get in MRI of skull ( brain).
However as I mentioned there are so many other reasons as , anemia ( Hb low ) , tension , anxiety , perimenopausal or post menopausal , stress , over exertion and so many.
It is very difficult to establish diagnosis with this short information .
In my opinion consult a physician and get his opinion as physical examination is important in such cases.
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Could Fainting Be Due To Poor Blood Circulation Or Low Blood Sugar Levels?

Hello You mentioned that these episode occurs at once without any warning , reasons are so many , these include: 1 Hypotension or hypertension , diagnosis can be confirmed by examination ( 3 -4 hours after this episode ). 2 Hypoglycemia or hyperglycemia as low blood sugar as well high blood sugar also produces such fainting.Get in HBA1 C and blood sugar level . 3 Brain tumor , this is one such cause , so get in MRI of skull ( brain). However as I mentioned there are so many other reasons as , anemia ( Hb low ) , tension , anxiety , perimenopausal or post menopausal , stress , over exertion and so many. It is very difficult to establish diagnosis with this short information . In my opinion consult a physician and get his opinion as physical examination is important in such cases.