<unk>  typically only occurs in those over the age of 50; particularly those in their 70s. It affects about 1 in 15,000 people over the age of 50 per year. It is more common in women than in men, by a ratio of 2:1, and more common in those of Northern European descent, as well as in those residing further from the Equator.
Giant cell arteritis
AL amyloidosis
Takayasu's arteritis
Stroke
Lupus headache
Medication overuse headache
Myofascial pain syndrome
Cluster headache