In my honest opinion, it's a process of elimination.
Since you started taking Synthroid, has ANYTHING else changed?
material that you're WEARING
new lotion a-n-y-t-h-i-n-g ???
If you can't come up with anything after searching your brain, the culprit COULD be Synthroid.
All the 10 months that I took levoxyl, every 3-4 weeks only
my right eyelid would get itchy & flakey.
Since I'v started Armour 13+ months ago, I don't HAVE that problem