Post-traumatic headache: commentary: an overview.

The history of post-traumatic headache begins in the middle of the 19th century, and its latest iteration has been defined in the International Headache Classification of 2004. Contrary to the latter, there are instances when mild head injury without symptoms or signs of concussion may evoke the pathophysiological changes of migraine. The mechanisms of chronic post-traumatic headache and the associated syndrome are complex and include pathophysiological, psychological, and socioeconomic factors. Treatment of these headaches is similar to that of the primary headaches with particular attention to nonpharmacological measures.