kimberly,
-:¦:-•:*'""*:•.-:¦:-•*Welcome to MyMigraineConnection!*•-:¦:-•:*'""*:•.-:¦:-
The general rule of thumb in deciding if someone is a good candidate for ONSTIM is to try nerve blocks in the occipital region. If they work, ONSTIM could be helpful; if they don't, it's thought that ONSTIM probably won't either.
It should be noted that ONSTIM is not yet FDA approved for the relief of headache and Migraine. You can read more about it in Occipital Nerve Stimulation for Migraine and Headache Prevention - 2008 Update.
Hope this helps,
Teri