So I've been trying to gain weight for a long time, at first on a high pro, low carb, high fat diet, but I guess my body doesn't digest fat well at all, so I was constipated all the time, and I didn't gain any weight.  Now I've switched to a high pro, high carb, low fat diet, and I'm only constipated on some days, but most days I am fine.  I have also started to finally gain some weight. 

But now I am getting these god awful migraines.  Last night was the third week in a row for me to get one on fri night/sat morning. 

I'm thinking maybe its all the increased sugar intake, because my high carbing has come from all fruits because they are more calorie dense which makes it easier to gain the weight. 

Heres a little background info if it helps.  I strength train three times a week, judo twice a week, and tricking./tumbling twice a week.  I weight 140-145, and am 5'9.  Recently I have been eating around 210g protein daily, and 270g carbs daily, with minimal fat. 

Anybody know what might be causing these migraines or what I should change in my diet to make them stop?

Thanks for the reply guittarman.  From what I've read on these forums you seem to know a lot about the paleo diet, so thanks for helping me out.

And with regards to your question, I started off doing the zone, so I had a pretty good balance of protein, carbs, and fat.  Then I starting leaning out too much, so I dropped some carbs and upped the fat.  Thats when I started to get all my digestive problems.  So i added the carbs back in, and dropped the fat.  Dropping the fat completely has left me without my digestive problems, but now I have the migraines.

My carbs when I was low carbing were very low.  I would only eat veggies, mostly broccoli, except for a piece of fruit after a workout.  I feel I had already gone through the period where my body shifts from using carbs to using fat as the energy source during my days with the rx'd zone, so I dont think that was part of it.

And I am thinking about trying something like a more balanced diet, by slowly reintroducing fat back into my diet.

all of my meat was always cooked, i think id have a hrd time with raw meat...

That can definitely make a differnce, depending on the meat and how it's prepared.  For example if you're eating fried chicken and well done meat and lots of extracted oils (vegetable, coconut, olive, nuts, etc), then I can see how that would cause problems.  

Have you thought about eating rare steak?  If you upped the intake of rare cooked fatty beef, you might do better on reduced carbs.
Not sure how you eat your veggies, but there's a good case to be made for eating your them cooked instead of raw.  Too much raw veggies can give me a headache - I do fine on fruit tho - avocado, tomato, peppers, all fruit.        

I was rid of migraines three weeks after beginning paleo. Forever.
At the time, my version was animal fat, raw meat, raw egg yolks and a little cooked veg.

I tried veggy fat years later, and the migraines did not return, but I also got cravings which tell me that veggy fat is not the way (and not paleo either).

BTW raw meat goes down a lot easier if it is grassfed organic and dried. The animal fat is still essential, proven for me because I get low fat headaches if I eat only jerky.