Fat Withdrawal?

I have been working on living primal for about a month and a half. For the most part I would say that the transition away from processed foods has been relatively easy. Today however I experienced something I hadn't before. I recently started logging my foods so I can get a more complete look at what I'm eating, and today about an hour after having lunch I got a horrible headache - borderline migraine. I started to assess myself and how I was feeling and noticed that I was craving bacon, so I went to the refrigerator and got a couple slices of bacon, and the headache slowly started to go away. I realized that for the first time in awhile I ate an almost fat free lunch: lots of fresh vegetables, some hummus and lean turkey breast. Could it be possible that my headache was due to lack of fat in what I ate?

If you were me, it would be because your blood sugar had surged after the fat free meal. Fat helps flatten blood sugar. YMMV

Oh, wow. So a big, dry salad of greens with nothing else can actually trigger a rise in blood sugar? Now, this is interesting. I thought that sugar suppressed fat burning. I never gave thought to the possibility of inverting the situation. Thankfully, all my salads are full of avocado and pecans, and usually some olive oil. I just instinctively add healthy fats to anything I'm eating when I can...

I've never experienced it because I also bury my spinach in dressing, however Bernstein's Diabetes Solution mentions a woman who spiked her bs by eating large quantities of plain iceberg lettuce. I just went and looked up spinach and I guess it could spike my blood sugar if I ate a small field, lol. (actually, about four cups plain would likely put me out of range, based on the ni)

I found that headache, nausea, iritation is often connected to imbalance of "something" in your body. In my case it's sugars.... took me years to figure it out but now whenever I get those familiar feelings of "headache, nausea, iritation" I first try sumething with sugar and 95% of time those symptoms subside

So I think you are on a good track trying to figure out the "food connection" to your heacache.