Abstract: A system and method for treating and diagnosing headaches includes a patient registry (10) comprising a processing unit (20) and one or more patient devices (14-18), a analytics section (12) and a clinician terminal (22). The system provides for the logging of generalised patient data, the generation of a differential diagnosis for patient and clinician use and for the logging of events relating to specific headache types. The system provides more comprehensive data input, including in real time, and as a consequence more effective management and treatment of headaches. There may be provided a sensing unit (18) for automatically sourcing and logging data relating to the patient and potential headache triggers.