Headache and epilepsy.

Headache and epilepsy often co-occur. Epidemiologic studies conducted in the past few years reinforce the notion of a bi-directional association between migraine and epilepsy. Data on an association between headache (in general) and epilepsy, however, are less clear. Peri-ictal headache often presents with migraine-like symptoms and can be severe. A correct diagnosis and management are paramount. It was demonstrated that cortical hyperexcitability may underlie both epilepsy and migraine. A recent study linked spreading depolarisation, the supposed underlying pathophysiological mechanism of migraine with aura, to epilepsy. Although this study was carried out in patients who had suffered a subarachnoid haemorrhage, the finding may shed light on pathophysiological mechanisms common to epilepsy and migraine.