The rage doesn’t always come only with hyperthyroid levels, though it can be worse at those times. It’s possible that your levels are normal, but that you haven’t had time enough to completely heal from the hyperthyroidism ~ your body cannot even begin to heal until your levels are normal, so that day is not the "all better" day, it’s the day that you can start to really feel better each and every day UNTIL you are all better, which can take time, more time than anyone wants (guaranteed ~ been there, done that, got the t-shirt).
One of the things I found helpful was to realize that there was some irrationality to my rage, which allowed me to NOT react every time I felt it. Jake’s reaction was always my favorite ~ tell everyone you love that this is a symptom, not our "new reality." Then, when the rage hits, and you find yourself screaming out of control (yes, it has happened to all of us), you can substitute words like "I LOVE YOU! I DON’T KNOW WHY I’M DOING THIS!" In Jake’s case, it broke the tension and everyone ended up having a good laugh, rather than emotional scars. Pretty nice outcome.
There’s a chance that anti-anxiety meds would be helpful for you, but I can’t speak directly to that, because I never used them. You may find it helpful to take extra care with yourself just now, if you take my meaning. Do what you love, don’t do what you hate, say no sometimes and learn to protect your sanity, in whatever way you prefer. That may help keep your emotions in check as well.
