I just started researching on a topic that had me worried ever since and may have found an explanation. Please let me know if you ever experienced something like that.

I have times when I get slighty higher body temperature for weeks or months. My temperature will be about 37,8 degrees celcius various times a day. Up to 37,5 is considered normal. It is not fever but this temperature is known for viral infections and stuff. I could never find an explanation for this and neither could the doctors. I was worrying for a long time that I might have some hidden tumor because "fever without explanation" can be one of the symptoms but as I have had this for years I don't worry about this anymore. I have had it again recently, I get drenched in sweat in the mornings and walk through the house half naked even though it is freezing outside. Now I started to do some reading on mania and temperature and found some other people to show this symptom too. I am just thinking about how I was feeling in these times and sometimes I was under enormous stress but also very active, sleeping little and having vivid dreams. So I am starting to think it might be a sign of mania/hypomania.

Does anyone else here experience something like that?