I don't have MS so I can't make any comparisons regarding that, but I do know that early on, an MRI was done to rule out MS as a cause for my face pain. I also don'e have BMS, so I can't help you there. If you read posts by other people, you'll see that this condition presents itself differently to everyone. The classic lightening bolt pains, the nature of the pain, and finally what the pain responds to is part of the diagnostic process. I was first given Trileptal and my pain disappeared. I've gone through too many meds, both sinularly and in various combinations, and I still treat with meds. I can't do without them as I haven't had a remission in a several years. Most people do have to go through quite a few to find something that will work for them. You need to speak with your doctor concerning all of this to find out what you do have. He/she is the best person to sort out your symptoms. Take care!