The conditions most easily mistaken with ON for other headache and facial pain disorders include migraine, cluster headache, tension headache, and hemicrania continua. Mechanical neck pain from an upper disc, facet, or musculoligamentous sources may refer to the occiput, but is not classically lancinating or otherwise neuropathic and should not be confused with ON. A crucial step in differentiating ON from other disorders is relief with an<unk>  nerve block.
Occipital neuralgia
Trigeminal neuralgia
Atypical trigeminal neuralgia
Trigeminal autonomic cephalgia
Thunderclap headache
Cold-stimulus headache
Orthostatic headache
Trigeminal trophic syndrome