Many survivors of typical concussive brain injuries (CBIs) complain of “headache.” The present chapter is an ambitious consideration of that fact, setting aside the disabling conventions that have bedeviled the traditional literature -- most importantly, the untenable assumption that head pain after CBI is a single problem with a uniform pathoetiology. The authors, all among the pioneers of traumatic brain injury scholarship, adopted an open-minded approach sensitive to the vast diversity of such head pain in terms of: (a) potential predisposing factors, (b) potential causal links between head impact and later head pain, (c) semiology, (d) pathophysiology, and (e) optimum management. What emerges is a far more nuanced explication of a topic that -- for want of such deep consideration -- has languished in the doldrums of simplistic dogma, which probably long delayed the kind of phenomenologically stratified research that is required before more patients can be rescued from this important type of post-concussive distress.