I am Type 2 on OmniPod with Hashimotos. Every once in awhile i get episodes of extreme grogginess that last for several hours at a time. Today I'm in one of those times. Can't keep my eyes open.
I checked my BG and it was sky high for me (245). Now I'm wondering if high BG would cause grogginess or if my thyroid is wonking out?
Wish meters could test for TSH at the same time as BG. Wouldn't that be cool?
High BG will do that. Once it's back down, you'll know if that's the cause.
Of course, also a possibility it's your thyroid & worth having thyroid levels tested. Other symptoms for hypothyroidism besides fatigue, not that everyone has every symptom.
If you get your thyroid tested, insist on Free T3 & Free T4 tests. TSH is useless to determine what's going on.
I would lean more towards the high blood sugar causing the tiredness if you have been checking your blood sugar and seeing high numbers each time you feel this way. If you are taking your thyroid medications regularly, I would not think that you would feel that different from one day to another due to your thyroid being out whack? Although I am not sure about this. I know that my doctor checks my thyroid level a couple times a year (I take medicine for hypothyroidism). I thought that this was standard. You may want to insist on being tested so you can rule out the symptoms being related to thyroid. And maybe your doctor can tell you if thyroid fluctuates much from day to day even without medication changes. Best of luck.
TSH changes only VERY slowly, so it wouldn't account for episodes of grogginess that last only a couple of hours. On the other hand, high BGs can EASILY account for that -- when your BG is high, NOTHING functions very well, including your brain. One of the reasons for working very hard to keep BGs in a nearly normal range is not only to prevent future complications, but also to feel good NOW.
Of course, as Gerri said, it never hurts to have your thyroid checked out -- if you already have established hypothyroidism, then your doc should be monitoring it carefully, because it CAN change, but the symptoms would more likely be long-term, continuous tiredness, weakness and lack of energy, (but not necessarily sleepiness) rather than episodes of grogginess.
So, I would say first target would be the BGs, and thyroid second.