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Old 04-26-2013, 07:01 PM   #1
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Dr. Barnes' BBT Test

I've been wondering a few things about Broda Barnes' basal body temperature test to help diagnose hypothyroidism.

- If I mention a low BBT temperature to a modern doctor, will I get laughed out of the room? About half the time, my morning temperature is 97 or lower, which doesn't seem healthy to me. It's only been over 97.8 twice, when I had terrible insomnia and got up numerous times during the night.

- I read something that said only a BBT under 96 is cause for concern, not the 97.8 that Dr. Barnes considered to be the cutoff point. If any of you did the BBT test, were you under 96, or were you only under 97.8?

- What does it mean if my temperature varies between 96.1 and 98.3 over the course of my menstrual cycle? Is a constant low temperature more indicative of hypothyroidism and weird spikes indicative of something else?

- I've been taking my temperature in my armpit, rather than my mouth, because I have a chronic sinus and ear infection, which would make an oral temperature inaccurate. But the last 3 days I took it in both places, and my armpit was actually .1 degree warmer than my mouth. Is that unusual for the two to be virtually the same? By the end of the day, my mouth is much warmer than my armpit, which is more normal. Why would my mouth be so cold when I first wake up? (No, I don't sleep with my mouth open, but my mouth is very dry in the morning.)

Just some idle questions, but I'm curious if anyone has any insight.

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Old 04-29-2013, 10:04 AM   #2
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Re: Dr. Barnes' BBT Test

I don't think many MDs today diagnose hypoT according to body temp alone. Even my homeopathic MD doesn't put much faith in it. Low BBT is a common sign of the disease, but other conditions can cause it, too. And it can be a personal variation among perfectly healthy people.

My BBT did run low before my diagnosis. The lowest, if I remember, was around 94.8° or thereabouts. I won't question outright Dr. Barnes' 97.8 limit, but it seems pretty normal for an early morning axillary temp to me.
"We can complain because rose bushes have thorns, or rejoice because thorn bushes have roses." Abraham Lincoln

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