“…The occurrence of symptoms of RES in clusters and coexistence of migraine with RES may support the association of RES with primary headache disorders, particularly with migraine and cluster headaches. On the basis of the available literature on RES, the differential diagnosis should be taken into account: upper cervical spine, trigeminal neuralgia, glossopharyngeal neuralgia, CPH, temporomandibular joint dysfunction, thalamic syndrome, migraine, otic zoster, herpes zoster virus infection of the C3-C6 dermatomes, Chiari type 1 malformation, SUNCT, erysipelas and exercise-induced compression of the cerebellar tonsils [1, 7,8]. In our patient's case the differential diagnosis were excluded.…”