Thanks everyone for taking time to respond and giving such great advice.
Harri- My husband has been on a few different migraine medication, none he says really helped all that much, however when he took the relpax, I could definitely tell that there was a switch. I don't know if medication that's too strong can cause a switch, but it seems like when he takes this medicine, he switches. However, he still complains of having a headache, just a slight one. So, I don't know, but the headaches get so bad, at least once each week, that he can't do anything but lie down and force himself to go to sleep. But, we'll keep on trying, thanks again.
lalark2- My husband is a computer programmer and has a very stressful, demanding job. not to mention KNOWING about the others has been really stressful for him. So, I am sure that, under any circumstance, stress is a major issue. He has a workaholic alter that has had him working 18 hour days, and then another part of him(possibly another alter) not feeling like it's enough or he's as great at his job as everyone thinks, etc. And, on the other hand, he is learning to open up and share his feelings...something he only did in the first 2 months of our relationship and we've been together almost 9 years now

. So, I told him that gaining control and an understanding of the alters might help and that he should be consistent with journaling to help with the process. He said that he would do it, but I'd need to remind him, needless to say, he hasn't. I think he's fighting against accepting it, he says that he does, but his actions say other wise. I don't know, thanks for your advice.
Hi Benny- My husband has been trying, for health reasons, to change his eating habits, but he definitely has an alter that loves sweets. During a time when our marriage was REALLY BAD, he found that he craved specific sweets(oddly it was something that he thought tasted bad) and then his headache(if only for a short period of time) would subside. But, he does avoid alcohol, ALWAYS. But, I will suggest that he gives the other foods a shot. I mean, it can't hurt, right?

Thanks for the advice!
kscarlett- I can not wait to buy the Head On for my husband. It's going to be so good if it works because he ALWAYS makes fun of the commercial and talk about how stupid the product is. He really hates it,

. So, I am going to get it, and if it works this will be good, if not, he'll have new jokes to make about it.

Thanks so much for taking the time to reply.