Migraines and family

Whenever I have to deal with family, it seems to trigger a migraine and or upset stomach. I know it has to do emotional trauma/neglect as a child and us siblings were pitted against one another by our parents, so now there is no friendly adult bond between us. If that's how it is, no real bond, I'm ok with that , what I want is to work on alleviating my migraines when a family member gets in contact with me. My way of dealing with this is keeping my distance, but at the same time I feel guilty about doing so. Has anyone dealt with this? I hope this comment is ok to post, if not you can delete it.