▁j ol ts " ▁for ▁ 1 ▁second ▁to ▁several ▁minutes ▁without ▁autonom ic ▁sympt oms ▁( te aring , ▁red ▁eye , ▁nas al ▁con g estion ). ▁These ▁head aches ▁can ▁be ▁treated ▁with ▁ind om eth ac in . ▁ ▁primary ▁c ough ▁head ache : ▁starts ▁suddenly ▁and ▁last s ▁for ▁several ▁minutes ▁after ▁c ough ing , ▁s ne ez ing ▁or ▁stra ining ▁( any thing ▁that ▁may ▁increase ▁pressure ▁in ▁the ▁head ). ▁Ser ious ▁causes ▁( see ▁secondary ▁head aches ▁red ▁flag ▁section ) ▁must ▁be ▁ruled ▁out ▁before ▁a ▁diagn osis ▁of ▁" ben ign " ▁primary ▁c ough ▁head ache ▁can ▁be ▁made . ▁ ▁primary ▁ex ert ional ▁head ache : ▁thro bb ing , ▁p uls atile ▁pain ▁which ▁starts ▁during ▁or ▁after ▁exer cis ing , ▁last ing ▁for ▁ 5 ▁minutes ▁to ▁ 2 4 ▁hours . ▁The ▁mechanism ▁behind ▁these ▁head aches ▁is ▁unclear , ▁possibly ▁due ▁to ▁stra ining ▁causing ▁ve ins ▁in ▁the ▁head ▁to ▁dil ate , ▁causing ▁pain . ▁These ▁head aches ▁can ▁be ▁prevent ed ▁by ▁not ▁exer cis ing ▁too ▁str enu ously ▁and ▁can ▁be ▁treated ▁with ▁medic ations ▁such ▁as ▁ind om eth ac in . ▁ ▁primary ▁sex ▁head ache : ▁d ull , ▁bil ater al ▁head ache ▁that ▁starts ▁during ▁sexual ▁activity ▁and ▁becomes ▁much ▁worse ▁during ▁org asm . ▁These ▁head aches ▁are ▁thought ▁to ▁be ▁due ▁to ▁lower ▁pressure ▁in ▁the ▁head ▁during ▁sex .