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...blood exits, it signifies that the flesh of the kidneys is eroded. However, that which flows from ulcerated ureters the ducts from the kidneys to the bladder is not bloody, but is merely mixed with much urine: for this reason, pain is perceived extending from the kidneys to the pubic bone. But if a little pus is voided with the urine, which settles quickly, it argues for an ulcerated bladder: and because of this, sharp pain is perceived both in the pubic bone and in the perineum. The same ulceration of the bladder is also indicated by small scales, and tiny pieces of flesh, and hair-like filaments, which exit with the urine, according to Hippocrates in aphorism 81, section 5. Pus, likewise, which is voided from the penis spontaneously and without urine, signifies an ulcer therein: and after the urination is finished, the pain is exacerbated. Pus also, which is mixed with semen, is viscous and sparse, and argues for an ulcer of the seminal vessels: therefore it argues for a virulent gonorrhoea a purulent discharge from the urethra, and it exits through the penis. But that which flows from the anus, that indeed signifies an ulcer of the haemorrhoids, or of the rectum, or of the colon, or of the mesentery, or of the liver, or finally of the spleen. But if it flows from ulcerated haemorrhoids, it appears mixed with blood: if from the rectum or the colon, it appears with the excrements of the gut. If it is also excreted from a ruptured abscess of the mesentery, it is discharged even with the feces themselves: but for this reason, pain of the belly around the navel, without any swelling of either hypochondrium the region under the ribs, fatigues the patient.