: ▁Head aches ▁that ▁happen ▁after ▁a ▁conv ulsion ▁or ▁other ▁type ▁of ▁se iz ure , ▁as ▁part ▁of ▁the ▁period ▁after ▁the ▁se iz ure ▁( the ▁post - ict al ▁state ) ▁ ▁Gast ro int est inal ▁dis orders ▁may ▁cause ▁head aches , ▁including ▁Hel ic ob acter ▁p yl ori ▁in fection , ▁cel iac ▁disease , ▁non - cel iac ▁gl uten ▁sens itivity , ▁ir rit able ▁bow el ▁synd rome , ▁infl am mat ory ▁bow el ▁disease , ▁g astro par esis , ▁and ▁he pat ob ili ary ▁dis orders . ▁The ▁treatment ▁of ▁the ▁g astro int est inal ▁dis orders ▁may ▁lead ▁to ▁a ▁rem ission ▁or ▁improvement ▁of ▁head aches . ▁ ▁Path oph ys i ology ▁ ▁The ▁brain ▁itself ▁is ▁not ▁sensitive ▁to ▁pain , ▁because ▁it ▁la cks ▁pain ▁re cept ors . ▁However , ▁several ▁areas ▁of ▁the ▁head ▁and ▁neck ▁do ▁have ▁pain ▁re cept ors ▁and ▁can ▁thus ▁sense ▁pain . ▁These ▁include ▁the ▁ext rac ran ial ▁ar ter ies , ▁middle ▁men inge al ▁ar tery , ▁large ▁ve ins , ▁ven ous ▁sin uses , ▁c ran ial ▁and ▁sp inal ▁n erves , ▁head ▁and ▁neck ▁mus cles , ▁the ▁men ing es , ▁fal x ▁c ere b ri , ▁parts ▁of ▁the ▁bra inst em , ▁eyes , ▁ears , ▁teeth ▁and ▁l ining ▁of ▁the ▁mouth . ▁P ial ▁ar ter ies , ▁rather ▁than ▁p