I was diagnosed with Graves Disease about 20 years ago. I was told it was permanent but medication could control it. Symptoms - Crazy memory problems and losing my eyebrows plus a tremor. About a year later my thyroid went underactive. So much for permanent Graves. I changed over to Synthroid and all was well. BUT periodically my thyroid goes overactive. I know it is off by the memory problems and thinning eyebrows. Does anyone else have these fluctuations? My endocrinologist argues with me every time I tell him I need a blood test because my thyroid is out - I am always right. My GP says this all very "unusual" and looks at me skeptically. Both try to get me to admit I am not taking my meds regularly - I am. Every day for years. Last year I had a biopsy done and all the nodes were cysts. He wants to do this every year and I say "No". Every time the hormone levels change I gain weight and can't lose it again. Pisses me off. Anyone?