Could be as "SWEATING" IS a side effect of Synthroid. While Synthroid's side effects on drugs.com don't specifically say "night sweats" - just "sweating" - think about it - during the day, we're constantly in changing temps, taking off or putting on our coats, getting in or out of heat/air conditioning vehicles and buildings and outside - always being subjected to unstable temperatures...
I'd ask your doc to check your hormones - ALL of them. Especially if you're in your 40's to 50's...
I too have Hashi's, with a multi-nodule and small goiter with ADRENAL INSUFFICIENCY, Adrenal Adenoma, Fibromyalgia and on and on.....
BTW, did you know that your adrenal glands ALSO make your sexual hormones? Like Estrogen(S), DHEA, testosterone - yes, woman have that too? They're a backup to your ovaries, etc. AND that these "Hormones" are really considered steroids?
And unfortunately, since Hashi's IS an Auto-Immune Disease, it can lead to another - so there are many things that could be causing your "night sweats".
Also, studies do show that people with Hashi's do much better on T3 and T4 than just T4. It's a wonder your Doctor didn't even check your T3. Something else to look at.
BE WELL!
Thanks - I can deal with the symptoms, but it's good to know that they're probably due to my thyroid rather than anything else!
I would say it is from the nodules and hashi's. Every so often I will get these moments of hyperness as well. With Hashi's you can expect these episodes of ups and downs where for a few days you will actually go hyper. My nodules disperse extra hormone at times and this will cause hyper episodes.
Once the Hashimoto antibodies have destroyed enough of your thyroid, you will not have these hyper episodes. Try to be patient as some of us it takes much longer for this to happen. :)