Monitor the safety and performance of the Pulsante Microstimulator System.

Inclusion Criteria:

1. Patient meets CE marked labeling for cluster headache.
2. Patient has the ability to read, comprehend and reliably record information as required by the Protocol.
3. Patient is able to provide written informed consent prior to participation in the study.

Exclusion Criteria:

1. Patient has other significant pain problem that might confound the study assessments in the opinion of the Investigator.

Subjects who meet the CE marked labeling for cluster headache for the Pulsante Microstimulator System