Interesting, I have never heard that before.
My sodium was slightly under earlier this year (by like 3 points) but now I’m back in range.
Caffeine is a diuretic which means that it results in an increase in frequency of urination. It can also increase the urge to urinate if consumed in excessive amounts. Caffeine is thought to have a direct effect on the bladder’s smooth muscle.
Besides the two responses. I would see a Nephrologist to rule out any kidney problems. A blood chemistry test known as eFGR RATED IN ml/min/1.73m2 will tell you how well your kidneys a functioning Some one 60 yrs old should have above 85. Below 60 is considered chronic kidney disease.
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There is a condition called diabetes insipidus that acts like that. I don’t remember much about it or the treatment for it from back in my military physicians assistant training because that was 50 years ago and I only saw two cases if it. But that’s only one possible cause.
Get to a doc, as it could be serious. I had DVT in 2018 and curiously enough, it was caused by gallbladder cancer. You can never tell.
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I have never heard of someone with insipidus and mellitus at the same time.
You would be the first if that is the situation.
Interesting. I’ve had hyperthyroidism in the past but never noticed (or was asked) about increased urination as a symptom. It does however screw up sleep, as it’s hard to sleep when you feel like you’re hyped up on caffeine. 
Yes, both DM and DI can happen, though in general DI is rare. To confirm, tests need to be run on the concentration level of the urine, also vital signs such as HR and BP. If those turn out positive, then you can do a vasopressin challenge. But given that OP said it’s at night and did not mention having to urinate a lot during the day, it would seem that it’s not DI but only a seasoned practitioner should rule it out (or in).
This sounds cyclical – have you (@tedos) ever been told you might have sleep apnea?
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Nope no sleep apnea. I did see a GP today and he asked me to go an do a spot micro urine test. He says it is unlikely to be kidney stones or UTI but the urine test should tell us more. Today is day 11 and while the frequent urination at night has gone away (it was only there on day 1 and 2), I’ve been getting discomfort in my groin/pelvis area, like its tired and overworked. And my lower back is sore when I wake up in the morning. I’m starting to feel a full bladder but unable to pee during the day (symptom of UTI) but this has only started to appear in the last 2 days.
I do still think if there’s nothing at all that comes up with labs or anything, worth a consult w a pelvic floor specialist/PT. Sounds similar to symptoms other people I know have had when dealing with those issues.
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@tedos It sounds like there could be one of a few different physical problems going on. Stress on the body, which these problems can create, does account for fluctuations in blood sugar readings. So, when you correct what is happening, you may find your blood sugars to (slowly or quickly) become more stable. At least I’m hoping for you that it will help.
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I hope you are able to find the cause of frequent urination at night! Anything that disrupts sleep, especially long term, is very concerning and damaging to health and healing!
As The_Senator_From_Glu suggested as a possible cause being Sleep Apnea, for me, that was exactly the case. My pre diagnosed/untreated severe Obstructive Sleep Apnea (OSA) included years with bouts of Nocturia, with 6 - 8 urination events each night just like you have described. I was told by my RT that during the multiple full or partial stoppages of breathing from OSA during the night, my O2 levels would drastically drop. My brain/body would notice the O2 drop and the dangerous rise of CO2. It would then send adrenaline out to wake me up, which most times would stimulate my bladder causing the frequent urination. Plus, I found out that the amount of each urination was even more exacerbated as each time I would get up I would get a small drink of water to offset the dry mouth from loud snoring and gasping. Once I began successful nightly use with my CPAP equipment, the Nocturia stopped almost immediately.
My thoughts and prayers are with you that an diagnosis and form of treatment may be as easily found and successful to take this completely away from your nightly sleep efforts.
John
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Just an update on this. I did a urine test, it came back and was normal. Then I went for an ultrasound, which also came back and said everything was normal and my kidneys were healthy.
The frequent urination hasn’t come back since my original post. But it does feel weird not being able to get to the root cause of it. The only thing i could think of is could it be kidney stones that I have since passed out in the urine? But i think kidney stones are painful, I didn’t get any pain.
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Great news! I am so glad that nothing was found. Perhaps it was just outlier events and won’t come back, but I completely understand the desire to figure out why they occurred!
John
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