I once researched it a bit (after I had it from time to time so bad that I coudn't hold any fluid anymore cause I spilled it everywhere...) and the only people I found having this sympthom where MS patients. A lot of them sad they got this long before other MS symthoms showed up and feel like this is some kind of wierd sympthom you get long before it gets diagnosable and it isn't recognized from doctors.
If it happens I have it a few days, this time it seems to stay for longer then a week. It starts with little shivering gets worser and worser till it slowly goes back again.
Often it happens without me noticing anything else... I mean nothing special at least I got a lot of chronic problems. I try to look a bit for it...
I never specially checked for other sympthoms. Right now I have it since a few days but I got pretty wierd sympthoms the last few weeks which are new.
I was coughing up fluid from my lungs, was collapsing and shivering on the hole body, sometimes reacting to questions but I was giving answers that had nothing to do with the question (at least I was told so, I don't remember). Blood in stool, loss of memory, babbling...
I also have times where I feel cold and I am shivering cause of this, even thought my temperture isn't sepcially low neither is the room temperture. But this is something else.