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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Fluctuations In Blood Sugar Reading?

Hi Doctor;im cecile the last one week I realise that my sugar is play up in the morn.it will be around 5-6 ;and at night after I eat it goes high;to 10.7 then goes down;and their be different reading when I take from my finger;and then I try from my ears it dose;t match ;im 70 yrs old in 2 weeks time thanks for your help.
Wed, 15 Oct 2014
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General & Family Physician,  's  Response
Hello there,
Blood sugars are not a constant number. They change throughout the day based on your food intake. When you get up in the morning it is almost 7-8 hours since your last meal. Your sugars tend to be on the lower side at that time. Yours are very much under control. After meals it will rise up and it will vary depending on the time after food that you check. Ideal would be to check after 2 hours of a meal. There should not be too much variation in your finger tip or ear lobe blood sugar value. But in my opinion you should check from your finger tip. Even your finger tip value and the one taken from a vein for lab tests will show about 20% variation (as finger tip is capillary blood and lab tests vein blood).
From what you have described your sugar values seem to be in control.
Hope this helps.
Take care.
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What Causes Fluctuations In Blood Sugar Reading?

Hello there, Blood sugars are not a constant number. They change throughout the day based on your food intake. When you get up in the morning it is almost 7-8 hours since your last meal. Your sugars tend to be on the lower side at that time. Yours are very much under control. After meals it will rise up and it will vary depending on the time after food that you check. Ideal would be to check after 2 hours of a meal. There should not be too much variation in your finger tip or ear lobe blood sugar value. But in my opinion you should check from your finger tip. Even your finger tip value and the one taken from a vein for lab tests will show about 20% variation (as finger tip is capillary blood and lab tests vein blood). From what you have described your sugar values seem to be in control. Hope this helps. Take care.