I was just going to post to what SKY stated.... many people with DID tend to have headaches right before or during a switch (alter change) - I have suffered from migraines since I was 12 years old (doctors could never find a physical or medical reason as to why)..... but then again knowing what we know now - I have also had DID episodes since I was 12 years old.

LoVe,
Rhapsody -