if you're only experiencing pain on one side only? Usually my migraine would be on one part or side of my head, either left or right. There are times I don't know how to deal with it.. Its more difficult to deal than experiencing the pain entirely.
It can certainly be just normal pain...or it can be indicative of something else. I would be more concerned if it were -always- on the left side, for example, than it occasionally being in this place or that. If you're really worried, you can have your doctor check it out to make sure there's nothing going on beyond normal migraines.
It must mean something if your pain is localized. A specialist would be able to understand what is going wrong. You should consult a doctor if you suffer from localized pain often, it could be a sign of an underlying problem.
The location of the migraine is extremely important in most cases. This is due to the fact that some are very painful and would need much stronger medication than the average person would. I feel that each person should go to the doctor and find out specifically what they need to do to relieve the terrible pain.