Maybe you have drank so much water that you have stripped your electrolytes which can be very dangerous? Do you get enough salt?

I really have no idea - Just a thought

I believe lactic acid build-up can cause nausea.

Southern Man

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We're on a road to nowhere. Come on along.

When I was in high school and doing stupid killer anaerobic workouts regularly, I often had bad headaches afterwards, especially in hot weather. Maybe you weren't sufficiently heat acclimated if it was a hot day or maybe it was overexertion. If it was the latter, improving your aerobic base might help you better handle and recover from running at such intensity.

If you didn't say that you had just ran a race and stated those symptoms, it's a classic migraine headache.

It sounds like for some reason exertion is inducing migraine headaches in your case. You ought to see a neurologist who specializes in migraine headaches, there are several good medications that can head these off as soon as they start so they don't progress to the nausea and horrible phase.

I don't know that I'm right for sure, but I doubt that you can become sodium depleted running a 10k... just my opinion. That can't totally be ruled out and it sounds like you could try maryt's advice as it certainly won't hurt anything. But I suspect it's an exercise induced migraine, for which there are a number of medications and other techniques that can be used to treat it. If they continue, see a headache specialist (and not some quack chiropractor or herbalist that claims various cures for headaches; see a neurologist that specializes in headaches.. ask around until you find a good one).

I hope it's electrolytes, because that can be easily fixed, but checking BP is a good idea - some pharmacies have machines anyone can use. It's also a good idea to check your temperature after your run. That would help you know if overheating itself is a factor separate from electrolytes or other factors. Another possibility too much sunlight and problems with glare can cause headaches, although I would think that would happen sooner - do you run with sunglasses, and if you do are they distortion free?

quote:<HR>Originally posted by Gotta Run:
bmccurdy and maryt,

My blood pressure was checked in April at an annual exam and was fine. I had it checked once a month or more during recent pregnancies, and was always fine. Are you thinking that a blood pressure problem would be a chronic, 24/7 thing, or are you saying that my BP might just be "off" during a run? Is it something I should check after a run? I am willing to look into anything! Thanks for your help!<HR>

Checking your BP randomly a few times (i.e. at the drugstore, or like you have at a physical exam or other clinic appt.) is the way to go. Everyones BP should go up slightly during exercise, it's when you're resting that you want to know about. If it was normal, it's doubtful to be a problem of hypertension.