What workup do you recommend for patients with stabbing headaches?

Stabbing headaches, also called icepick headaches or jabs & jolts, are severe pains in the head, often occurring spontaneously but sometimes caused by coughing or sneezing, lasting for seconds. They are so intense that they make the sufferer grab his or her head. They generally occur infrequently in sufferers of migraine or cluster headache and generally need no treatment other than reassurance that they are part of the migraine/cluster headache presentation. They will generally improve when the...