Hi there, I have been on 100mcg thyroxine since February. My last blood test results in June were TSH 2.4 (range 0.5 - 5.5) and T4 17.1 (range 11 - 24), which are both bang in the middle. However, since being abroad in the heat and coming back to hot weather, I have been sweating more than I used to and producing a lot of saliva. The past couple of weeks, my upper lip has been almost constantly beaded with sweat and the edges of my lips have felt wet. Also, my husband commented on how hot I was to the touch the other morning. But how can this be if my bloods just three months ago were "normal". Any thoughts on this appreciated.