Hi All,
I don’t know if anyone can shed any light but since I had a decrease in Levothyroxine in April this year from 150/125 alternate days to 125mg daily I have started sweating at night in bed and a couple of times through the day, is this due to medication change or just coincidence, I always get migraines for a while when I reduce or increase.
I have no thyroid as I had it removed in 2009.
Looking at the results you posted a month ago, your dosage shouldn’t have been reduced. 
I wish GPs actually understood how to read thyroid blood tests...
I would say it’s highly likely the dose change is causing the sweating (and migraines).
For me this is a common symptom of being under medicated.
I think I will go back to my GP and tell them that I am feeling worse on the new reduction, I wasn’t sweating before hand.
Bloods should be retested 6-8 weeks after any dose change or brand change in levothyroxine
Inappropriately reduced dose levothyroxine can result in drop in B12 (frequently causes night sweats)
Low vitamin D, folate and ferritin too
For full Thyroid evaluation you need TSH, FT4 and FT3 tested. Also EXTREMELY important to test vitamin D, folate, ferritin and B12
Recommended on here that all thyroid blood tests should ideally be done as early as possible in morning and before eating or drinking anything other than water .
Last dose of Levothyroxine 24 hours prior to blood test. (taking delayed dose immediately after blood draw).
This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip)
Private tests are available as NHS currently rarely tests Ft3 or thyroid antibodies or all relevant vitamins
List of private testing options
thyroiduk.org/getting-a-dia...
Medichecks Thyroid plus antibodies and vitamins
medichecks.com/products/adv...
Thriva Thyroid plus antibodies and vitamins By DIY fingerpick test
Thriva also offer just vitamin testing
Blue Horizon Thyroid Premium Gold includes antibodies, cortisol and vitamins by DIY fingerprick test
bluehorizonbloodtests.co.uk...
If you can get GP to test vitamins and antibodies then cheapest option for just TSH, FT4 and FT3
£29 (via NHS private service ) and 10% off down to £26.10 if go on thyroid uk for code
thyroiduk.org/getting-a-dia...
NHS easy postal kit vitamin D test £29 via
I should be due to be retested soon. My last blood test I was in range but my GP said I was high in the range and it could be dangerous so she reduced them.I will get them done privately. Thanks for the info SlowDragon.
The one time i was actually sure i was overmedicated, the symptoms were fine tremor in fingers, and over frequent bowel movements (and odd things like calcium oxalate chrystals in urine with pains like ?kidney stone .. but without a kidney stone) but sweating at night didn't happen then.
It has happened to me for other periods of time , sometimes possibly menopause related , sometimes possibly undermedicated, sometimes possibly 'somethingelse ?'
So for me, i think it could sometimes be due to being undermedicated, and isn't due to overmedication. (If it was overmedication , i might expect to feel too hot ALL day)
Again last night I woke up sweating and it can happen in the day but would say it’s worse at night. I still can feel the cold too, it’s like my body temp is up and down. Oh the joys of being messed around by GP’s.I will have to get my thyroid function test and vits done privately.
I find being in a cold room makes it worse (even if I feel warm in bed). Sometimes I think it’s a sugar crash as well? So I try not to have anything sweet from late PM onwards.
Sweating 
Sweating 
Excess sweating 
