Dear dom:
The way I understand the concept of “chakra blockage” is distress blocking the natural flow of energy, such as breathing shallowly caused by distress. Tightness in other muscles due to distress disrupts the easy positioning of those muscles, so our shoulders, for example, feel tense. Your migraines, for lack of a medically identified cause, may be due to distress, ongoing distress. Calming techniques and practices can help as well as healing the root causes of anxiety/ distress, such that can be found in childhood, those Formative Years.
anita