Crazy-high boosts in health have resulted in reports of people being unable to remove the ring (or whatever). For some reason it kills them.
This i sremedied by sleeping for a 24 to 48 hours and you will be fine after that. I have millions of hit points and when I remove the enchanted gear I just sleep first to ensure I will be ok. --- XboX360 for Skyrim PS3 for everything else!!! I am unstoppable!!!!