Someone I used to work with told me his wife was suffering from fatigue, balance problems, light-headed, and brain fog. After a lot of failed treatments, an Ear Nose Throat doctor said a long-shot thing to try is physical therapy for the muscles that go from the neck and into the back of the head. After a month of physical therapy his wife was almost completely well. And today, a doctor told me that in rare cases some compression of the spine in the neck area can cause fatigue, confusion, etc. But usually there are other symptoms too like hand numbness or other things. Anyway, the two things I mentioned are different. But they both affect the neck area. I thought I'd put this up in case it helps someone. As for me, I've been getting neck pains, and if there is a chance this could be the cause, I'm going to see how I might follow up on this.