is sleep-maintenance insomnia more likely to be caused by a mental issue or a physical issue (eg. hyperthyroidism)?
I have some symptoms consistent with hyperthyrodism. I am super anxious and edgy all the time and I suffer from extreme insomnia. I have only gotten about 4 hrs. of sleep on average since mid-March. I used to think it was due to Covid-19 anxiety, but looking back I started having sleeping problems back in December of 2019. My biggest issue is sleep maintenance. It started with me waking up early in the morning (7-8 AM) and got progressively worse. Right now, I always wake up about 2-4 hours after falling asleep in a super agitated/edgy state and I can't get back to sleep no matter how hard I try. Furthermore, I don't feel tired (sleepy) like you would expect. I just feel physically and mentally fatigued beyond words. It's like my need for sleep has been reduced. It's sort of like I'm experiencing a drawn-out episode of dysphoric mania. Besides this, I am not really experiencing other obvious symptoms. Mentally I seem to be fine. My BP is normal. My heart-rate is normal. I have not lost weight. Could it be thyroid issues?
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