[Nummular headache: case report].

Nummular headache or coin shaped cephalalgia was first described by Pareja and coworkers in 2002. It seems to be a primary headache that has a chronic course, with a circumscribed area of pain described by the patients as elliptic or coin shaped. Patients experience periods without pain followed by bouts of daily headache. In the original series of thirteen cases it was sometimes associated with other primary headaches, but not necessarily. It could also be related to cranial trauma. We present the first case of of nummular headache described in our country with clinical features similar to the original series. We intend to alert neurologists and pain specialists to the existence of this unusual headache and also discuss the possible differential diagnosis of this cephalalgia.