Cluster headache is an exceptionally painful disorder, which happens to affect men about twice as often as it affects women. Since the early 1970s, doctors have understood cluster headache to be a masculine disorder — so much so, that some doctors have argued that even women with cluster headache have masculine characteristics. As I discuss in my 2006 Gender & Society article, there is no evidence that this is the case. Case in point — here are several women with cluster headache. Do any of them look “masculine” to you?