Propositiones de lithiasi tōn nephrōn

or, passing through the passages, wounds the parts it touches, or dilates the duct so that some blood flows out mixed with urine from the vena cava.

XXII.
The patient lying on the side of the pain, or when empty of food, perceives relief from pain: when lying on the opposite side, or when food has been taken and begins to slip into the intestines, then the pains are almost always exacerbated.

XXIII.
The excretion of blood often reveals a stone in the kidney which was previously indicated by neither pain nor any other sign, to such an extent that it was not even thought to be present.

XXIV.
When this sign accompanies a dull, heavy pain, we know it is still in the substance of the kidneys. For when it enters the urinary vessels, or is propelled, or descends, it excites sharp pains: which, as the stone returns into the cavity of the kidney, soften.

XXV.
Then grains gravel come out, sometimes reddish, sometimes yellowish, sometimes ash-colored, just as the material of the stone was, or whether it is recent or old.

XXVI.
The affliction must be diligently treated while it is recent: for if it persists, or is long-lasting, by inflicting pains, causing sleeplessness, and provoking most troublesome vomiting, it casts down the strength: when this is cast down, there is no hope of health, as Galen attests in his book On the Diagnosis and Cure of Affections of the Kidneys.

XXVII.
The vice of nephritis kidney inflammation/stone pain is sufficiently stubborn, so that it sometimes accompanies a person to death, Galen, On the Preservation of Health, book 6, chapter 7, and