Oflittlechildrenwhoareseizedwiththisdisease，thegreaterpartdie，providedthedefluxionbecopiousandhumid，fortheveinsbeingslendercannotadmitthephlegm，owingtoitsthicknessandabundance;butthebloodiscooledandcongealed，andthechildimmediatelydies。Butifthephlegmbeinsmallquantity，andmakeadefluxionintoboththeveins，ortothoseoneitherside，thechildrensurvive，butexhibitnotablemarksofthedisorder;foreitherthemouthisdrawnaside，oraneye，theneck，orahand，whereveraveinbeingfilledwithphlegmlosesitstone，andisattenuated，andthepartofthebodyconnectedwiththisveinisnecessarilyrenderedweakeranddefective。Butforthemostitaffordsreliefforalongerinterval;forthechildisnolongerseizedwiththeseattacks，ifonceithascontractedthisimpressofthedisease，inconsequenceofwhichtheotherveinsarenecessarilyaffected，andtoacertaindegreeattenuated，soasjusttoadmittheair，butnolongertopermittheinfluxofphlegm。However，thepartsareproportionallyenfeebledwhenevertheveinsareinanunhealthystate。Wheninstriplingsthedefluxionissmallandtotherightside，theyrecoverwithoutleavinganymarksofthedisease，butthereisdangerofitsbecominghabitual，andevenincreasingifnottreatedbysuitableremedies。Thus，orverynearlyso，isthecasewhenitattackschildren。
Topersonsofamoreadvancedage，itneitherprovesfatal，norproducesdistortions。Fortheirveinsarecapaciousandarefilledwithhotblood;andthereforethephlegmcanneitherprevailnorcooltheblood，soastocoagulateit，butitisquicklyoverpoweredandmixedwiththeblood，andthustheveinsreceivetheair，andsensibilityremains;and，owingtotheirstrength，theaforesaidsymptomsarelesslikelytoseizethem。Butwhenthisdiseaseattacksveryoldpeople，itthereforeprovesfatal，orinducesparaplegia，becausetheveinsareempty，andthebloodscanty，thin，andwatery。When，therefore，thedefluxioniscopious，andtheseasonwinter，itprovesfatal;foritchokesuptheexhalents，andcoagulatesthebloodifthedefluxionbetobothsides;butiftoeither，itmerelyinducesparaplegia。Forthebloodbeingthin，cold，andscanty，cannotprevailoverthebutbeingitselfoverpowered，itiscoagulated，sothatthosepartsinwhichthebloodiscorrupted，losetheirstrength。
Thefluxistotherightratherthantotheleftbecausetheveinstherearemorecapaciousandnumerousthanontheleftside，forontheonesidetheyspringfromtheliver，andontheotherfromthespleen。Thedefluxionandmeltingdowntakeplacemostespeciallyinthecaseofchildreninwhomtheheadisheatedeitherbythesunorbyfire，orifthebrainsuddenlycontractarigor，andthenthephlegmisexcreted。Foritismelteddownbytheheatanddiffusionofthebutitisexcretedbythecongealingandcontractingofit，andthusadefluxiontakesplace。Andinsomethisisthecauseofthedisease，andinothers，whenthesouthwindquicklysucceedstonorthernbreezes，itsuddenlyunbindsandrelaxesthebrain，whichiscontractedandweak，sothatthereisaninundationofphlegm，andthusthedefluxiontakesplace。Thedefluxionalsotakesplaceinconsequenceoffear，fromanyhiddencause，ifwearetheatanyperson’scallingaloud，orwhilecrying，whenonecannotquicklyrecoverone’sbreath，suchasoftenhappenstochildren。Whenanyofthesethingsoccur，thebodyimmediatelyshivers，thepersonbecomingspeechlesscannotdrawhisbreath，butthebreath（pneuma）
stops，thebrainiscontracted，thebloodstandsstill，andthustheexcretionanddefluxionofthephlegmtakeplace。Inchildren，thesearethecausesoftheattackatfirst。Buttooldpersonswinterismostinimical。Forwhentheheadandbrainhavebeenheatedatagreatfire，andthenthepersonisbroughtintocoldandhasarigor，orwhenfromcoldhecomesintowarmth，andsitsatthefire，heisapttosufferinthesameway，andthusheisseizedinthemannerdescribedabove。Andthereismuchdangerofthesamethingoccurring，ifhisheadbeexposedtothesun，butlesssoinsummer，asthechangesarenotsudden。Whenapersonhaspassedthetwentiethyearofhislife，thisdiseaseisnotapttoseizehim，unlessithasbecomehabitualfromchildhood，oratleastthisisrarelyorneverthecase。
Fortheveinsarefilledwithblood，andthebrainconsistentandfirm，sothatitdoesnotrundownintotheveins，orifitdo，itdoesnotmastertheblood，whichiscopiousandhot。