My Endo keeps taking me to less than 2. 0 and says that is good. I know better because my hair gets brittle and my nails and skin around my nails get so brittle that my the skin around my thumb nails split. I told him it was too low and to change it. He did change it and my hair and nails became some better, but the sweating and heat intolerance will not go away. What is funny to me is, the profuse sweating and heat intolerance are symptoms that you are to call your doctor about if you start experiencing them. He says he has been doing this for 10 years and I am the only person that has this problem. I told him it is because most women believe it is menopause. He is a PA, but I would think he would be consulting with the doctor about my issues. I am at a loss as what to do. I went off the meds for 4 months and my TSH went to 15.0