cing ▁an ▁attack ▁ 3 0 ▁minutes ▁following ▁activity . ▁ ▁A ▁paper ▁by ▁She f fer ▁and ▁Aust en ▁( 1 9 8 0 ) ▁spl its ▁an ▁E IA ▁event ▁into ▁four ▁distinct ▁stages : ▁prod rom al , ▁early , ▁fully ▁developed , ▁and ▁late . ▁Character istic ▁sympt oms ▁of ▁the ▁prod rom al ▁stage ▁include ▁red ness ▁and ▁it ch ing . ▁In ▁the ▁early ▁stage , ▁general ised ▁u rt ic aria ▁develop s . ▁If ▁the ▁reaction ▁does ▁not ▁dimin ish , ▁it ▁may ▁become ▁fully ▁developed ▁E IA , ▁in ▁which ▁g astro int est inal ▁sympt oms ▁and ▁con str iction ▁of ▁the ▁air way ▁may ▁occur . ▁The ▁late ▁phase , ▁which ▁follows ▁recovery ▁from ▁the ▁reaction , ▁includes ▁front al ▁head aches ▁and ▁a ▁feeling ▁of ▁fat igue ; ▁these ▁sympt oms ▁may ▁manifest ▁themselves ▁up ▁to ▁ 7 2 ▁hours ▁following ▁on set ▁of ▁the ▁reaction . ▁ ▁Card i ov asc ular ▁sympt oms ▁are ▁reported ▁in ▁ 1 / 3 ▁of ▁patients ▁diagn osed ▁with ▁E IA . ▁ ▁Food - dependent ▁exercise - indu ced ▁an ap hy la xis ▁ ▁Food - dependent ▁exercise - indu ced ▁an ap hy la xis ▁( F DE IA ) ▁is ▁a ▁sub category ▁of ▁the ▁dis order ▁where ▁exercise ▁only ▁inv okes ▁a ▁reaction ▁when ▁followed ▁by ▁the ▁ing estion ▁of ▁a ▁food ▁aller gen . ▁Pat ients ▁whose ▁E IA ▁is ▁food - dependent ▁are ▁thought ▁to ▁make