onset headache / E. Abnormal neurological examination F. Headache / numbness / dizziness / B. Thunderclap headache / For Headache / lack of coordination / infection M. New onset headache / posture G. Headache / NB migraine / H. Headache / paroxysmal hemicrania / unilateral neuralgiform headache / cerebral venous sinus thrombosis J. Jaw claudication K. Nuchal rigidity L. New / e.g. coughing / cancer N. Cluster headache / HIV / migraine / usual headache / headache / /