I also have a terrible rxn to the sun (not even that much exposure will knock me for a loop...I'm talking about an hour is enough). I get terrible bone pain, anxious, depressed...killer headache. I'll then have a fever for days & be exhausted. I've actually been tested for parathyroid disease twice, but came back negative. Yours if the first post that I've read relating similar experiences. I'm hoping that balancing my adrenals & thyroid will help as this has NEVER been a problem for me in the past. I'll be sure to post if I experience any improvement.