, ▁central ▁and ▁primary ▁fa cial ▁pain ▁and ▁other ▁head aches ▁for ▁the ▁last ▁two ▁groups . ▁ ▁The ▁I CH D - 2 ▁classification ▁defines ▁mig ra ines , ▁t ension - types ▁head aches , ▁cluster ▁head ache ▁and ▁other ▁trig em inal ▁autonom ic ▁head ache ▁as ▁the ▁main ▁types ▁of ▁primary ▁head aches . ▁Also , ▁according ▁to ▁the ▁same ▁classification , ▁st abb ing ▁head aches ▁and ▁head aches ▁due ▁to ▁c ough , ▁ex ert ion ▁and ▁sexual ▁activity ▁( sex ual ▁head ache ) ▁are ▁class ified ▁as ▁primary ▁head aches . ▁The ▁daily - pers istent ▁head aches ▁along ▁with ▁the ▁hyp nic ▁head ache ▁and ▁th under c lap ▁head aches ▁are ▁considered ▁primary ▁head aches ▁as ▁well . ▁ ▁Second ary ▁head aches ▁are ▁class ified ▁based ▁on ▁their ▁cause ▁and ▁not ▁on ▁their ▁sympt oms . ▁According ▁to ▁the ▁I CH D - 2 ▁classification , ▁the ▁main ▁types ▁of ▁secondary ▁head aches ▁include ▁those ▁that ▁are ▁due ▁to ▁head ▁or ▁neck ▁tra uma ▁such ▁as ▁wh i pl ash ▁injury , ▁int rac ran ial ▁h emat oma , ▁post ▁c ran iot omy ▁or ▁other ▁head ▁or ▁neck ▁injury . ▁Head aches ▁caused ▁by ▁c ran ial ▁or ▁cer v ical ▁v asc ular ▁dis orders ▁such ▁as ▁is chem ic ▁stroke ▁and ▁trans ient ▁is chem ic ▁attack , ▁non - tra um atic ▁int rac ran ial ▁hem or rh age , ▁v asc ular ▁mal form ations