Megan McArdle

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Question of the day

17 Sep 2007 09:46 am

I've got a nasty cold, which has been retreating and resurging for the better part of three weeks. Today is a resurgent day, prompting me to wonder: why do you feel cold when you're running a slight fever? I realize there's a stronger contrast between your internal temperature and the outside, but I'd be surprised to find that I'm running as much as two degrees of fever, so the contrast can't have increased that much. Can readers comment?

Comments (12)

seems like it's because you feel the heat going away from you... and also your responses when sick are just wholly different when you are healthy. I was running a fever last week, while shivering... and it was the strangest. Sorry to hear you have the gross... feels like everyone does all of a sudden. don't underestimate the power of rest. I think we often prolong colds because we simply won't slow down, and so we have a low grade cold for a long while instead of a short. Will your new masters let you work from home?

Wikipedia is a wonderful resource :)

Hope you feel better - being sick is no fun, especially with fall creeping in on us.

Seems to me that the brain normally shields you from meaningless changes in your environment - a slow two-degree change in air temperature, for example, is not something you're likely to notice, though your body is equally capable of detecting it. It's just that your brain filters that information out as meaningless "static". When you run a fever, unlike a change in weather conscious attention is required to ensure proper treatment, and so your body/brain is programmed to treat that input differently. Thus the chills and whatnot.

Probably not a cold. Probably and infection. Might be alergies. Might be allergies led to an infection which moves with your allergy symptoms.

you feel cold because when you develop a fever, your hypothalmus, which functions as the brain's thermostat, resets the internal temperature upward (like turning up your thermostat at home). This causes the hypothalmus to send chemical messages back to the body saying, essentially "you're too cold for this new elevated temperature I've just set, warm up." That's what causes the chills and shivering. When your body reaches the elevated fever temperature and the infection is fought off, the fever "breaks", meaning the hypothalmus resets the temperature back to normal, and the body receives signals that it is too warm (which is why when your fever breaks you sweat and feel so hot).

Feel better!

God it's the worst. Like you can't get warm no matter what you do, even though you're burning up. I hate that.

I always figured you feel cold so you will run a fever.

In other words part of your brain tricks the rest into thinking you're colder than you actually are so the internal thermostat gets turned up.

Get some medical help right away.

It's not a cold. This could be something serious, even life-threatening.

You shouldn't take risks with your health.

Dr. Gregory House

Hey House,

I'm the only one authorized to imitate me on this blog, and I know me, am friends with me, and you sir are no me. If you do not stop, I will get a TRO ASAP with a DNR for extra measure.

Do not pretend to give to fake medical advice - leave it to the professional fakes.

Also, your post did not keep with the theme of past posts -- Megan is lying about something or omitting an important fact. What is it this time, Megan? What really happened in Toronto?

Oh, and it totally sucks that Hugh, I mean I, lost to Spader last night. Jimbo the gumba I could understand, but Spader!

Here is something to read. I don't believe a cold, no matter how nasty, could be the problem. The article mentions infections as a likely cause. I'm sure The Atlantic provides a complete health plan, go see a doctor.

Dr. House,

There's more than one Doctor named House.

In fact, when I am having intercourse with my lovely bride, who is also a doctor, she often calls out "Is there a doctor in the House?"

Somewhat insensitive, if you ask me.

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