<unk>  is caused by damage to the<unk>  nerves, which can arise from trauma (usually concussive or cervical), physical stress on the nerve, repetitive neck contraction, flexion or extension, and/or as a result of medical complications (such as osteochondroma, a benign bone tumour). A rare cause is a cerebrospinal fluid leak. Rarely,<unk>  may be a symptom of metastasis of certain cancers to the spine. Among other cranial neuropathies,<unk>  is also known to occur in patients with multiple sclerosis.
Occipital neuralgia
Trigeminal neuralgia
Atypical trigeminal neuralgia
Trigeminal autonomic cephalgia
Thunderclap headache
Cold-stimulus headache
Orthostatic headache
Trigeminal trophic syndrome