Blood offending in quantity can either break the Veins, or open the Orifices of them.
In quality, if it be too hot, or too thin, it will flow out by Anastomosis, because heat doth dilate the Orifice, and thinness maketh it flow more easily. Also the same qualities make a Diapedesis: for heat maketh the coats of the Vessels thin, and the thinness of the blood makes it easie to pass through the pores of those coats.
Lastly, The sharpness of the Blood gnaweth the Tunicles of the Veins, and ulcerateth them, from whence cometh a Diabrosis.
The external Causes also do concur to produce this Disease, either mediately, or immediately.
Immediately, as falls, stroaks, wounds, and the like, which break and divide the Veins.
They work mediately which do encrease, warm, and make thin the blood, as plentiful Diet, Drun∣kenness, Idleness, too much Exercise, great Noise, Heat, long staying in the Sun, and the like.
The Differences of Hemorrhagia are these: Some are Critical, some Symptomatical.
Critical Hemorrhagia's are in acute Feavers, by the force of Nature endeavor to expel the cause of the Disease this way, as especially in those Diseases which are joyned with the Inflamation of some Entral, especially of the Liver, or the Spleen, which are many times discharged by these waies; somtimes it comes without a Feaver, when Nature dischargeth her self of the superfluous blood, whence we see many in their youth have an Hemorrhagy by fits, and others bl••ed other waies.
A Symptomatical Haemorrhagy happeneth chiefly in Chronical Diseases, in which filthy blood is produced by reason of the debility of the Liver, or some other great Distemper, which either flows through those Veins by the weakness of the retentive faculty, or is sent forth by the expulsive, as an unprofitable burden, because impure blood is not fit to nourish the Body.
Haemorrhagia is known of its self. But its Causes are thus distinguished: That which cometh by Anastomosis, hath this common with that which comes by Rexin, or rupture, in that in both the blood floweth plentifully; but in this they are distinguished, If a blow or a fall went before, we should suppose it to be Rexin: But when Ruption cometh from Plethora, or much Blood; as also apertion of the Veins; thus they may be distinguished: When the Vessel is broken, the Blood slow∣eth constantly; when it is opened, at a distance, and by fits only; because the Orifices of the Vessels use to be knit and closed when there is less plenty of the Humor which dilateth flowing thereto; but broken Vessels stand alwaies open, and therefore blood continually sloweth till the solution of con∣tinuity be united. Moreover the opening of a Vein, is distinguished from the breaking, by the sub∣stance of the blood: For if it be thin, it comes from a Vessel opened; if thick, it comes from a bro∣ken. Hence it is that Hemorrhagy comes in yong men for the most part by the opening of the Ves∣sels, because their blood is thin; but in old men from Ruption, because theirs is thick.
If it comes from Ero••••on of the Veins, there will be signs of Cacochymia, or ill juyce in the body of an Ulcer, and matter somtimes comes forth: or at least a salt Catarrh hath gone before. If it comes by Diapedesis, or Rarefaction, the blood is thin and little.
The Causes autecedent and external, are easily distinguished: For if it come from plenty of blood, there is a red face and large veins: as also the Diet hath been large and hot, or there hath been some external cause which hath melted and made thin the blood, and these especially befal them who have very hot Livers.
If it come from evil Juyce, it is known by its proper signs, which declare whether Choller or Me∣lancholly doth abound: Moreover, the Blood will appear corrupt either from the Nose, or taken from the Arm.
If it come from the weakness of the retentive faculty, the face wil be pale, and the whol body weak; as also some Disease hath gone before, by which the Liver was first weakened, and then very little blo•••• comes forth, and by degrees.
If the blood comes immediately from the Veins of the Nostrils, it is easily stopt with astringent Me∣dicines applied thereto, and there will be no pain in the Head. Contrary wise, if it come from the Brain, there is some pain in some part of the Head, the flux is hardly stopped, and things put up into the Nose do no good. Somtimes blood comes from other parts, as the Liver, Spleen, Womb, whose signs are the pains and extensions in those parts.
If the blood flows from an Artery, it comes with force, it is hot, pure, fresh, and clear; but when it comes from a Vein, it is dark, red, thick, somtimes foul, and comes forth with smal force.
The Prognostick of Hemorrhagy coming, especially if it be Critical, is taken from the hurt actions, when the Excrements and qualities are changed: as watchings, and dreams of red things, a great pain of the Head and Neck, heaviness in the Temples, and great beating of those Arteries, ringing and noise in the Ears, dulness of the Eyes, with redness thereof, and of the whol face, hating of light, invo∣luntary tears, itching of the Nose, a drop of Blood upon the day that declares the Crisis, difficulty of breathing, an extension of the Hypochondria without pain.
The Reason of which signs is: When the Blood begins to be carried to the Head, it begets in the Head Phantasms of red things, both waking and sleeping: as it happened to a yong Roman which