The foregoing case is easily managed. But there is more trouble with those tumours, that come from an internal cause, and tend to suppuration. That all these are kinds of abscesses, I have elsewhere shewn, and treated of the medicines proper for them: it now remains, that I mention the manual operations necessary for their cure. Wherefore it is requisite, before they grow hard, to cut the skin, and apply a cupping vessel to evacuate any bad and corrupted matter which may have been collected there: and this may be repeated a second and third time, till all the symptoms of an inflammation be gone. Nevertheless, it is not right to trust(2) entirely to the cupping vessel.

Sometimes also it happens, though rarely, that a collection of pus is inclosed in a covering of its own: the ancients called this a coat. Meges, because every coat is nervous, affirmed a nerve was not generated in a disorder, which destroyed the flesh, but that the pus being lodged below for a long time, was surrounded with a callosity. This however has not the least relation to the method of cure; because the same course, that ought to be pursued if it be a coat, is also necessary if it be a callosity. And though it should be a callosity, yet as it invelops something, there is no reason against calling it a coat. And then again, it is not uncommon for this to be found even before the suppuration is formed(3), and therefore what is below it cannot be extracted by a cupping vessel. But this is easily discovered, when the application of that instrument has made no change. Therefore, where-ever that happens, or when there is already a hardness, nothing is to be expected from this remedy: but as I have directed elsewhere, either the afflux of matter to the part must be diverted, or it must be discussed, or brought to a perfect suppuration. If either of the former has taken place, nothing further is necessary. If the pus has been maturated, in the armpits and groin an incision is rarely to be made: likewise where-ever the abscess is but small; also where-ever the malady is in the surface of the skin, or even in the flesh; unless the weakness of the patient obliges us to lose no time. And it is sufficient by cataplasms to assist the pus to make its own way. For the part, that has not been touched by an instrument, is generally free from a scar. If the malady lies deeper, it ought to be considered whether the part be nervous or not. For if it be nervous, it should be opened by the actual cautery; the reason of which is, that a small wound may keep open longer for evacuating the pus, and the cicatrix afterwards may be small. But if there be nerves near it, the actual cautery is improper, lest convulsions follow, which may debilitate(4) the limb; yet the assistance of the knife is necessary. The others may be opened before they be quite mature: but amongst tendons the utmost ripeness is to be waited for, that the skin may be thin, and the pus brought close to it, that it may be the sooner found. And some again require a wound(5) in a straight direction, as those in the flesh: but others render the skin extremely thin; and in such the whole surface of it above the pus must be cut away. Now in all cases where the knife is used, care must be taken, that the wounds be as small and as few in number as possible: with this caution, however, that we do all the case requires, both with regard to size and number: for larger cavities require broader incisions; sometimes even in two or three different directions. And we must endeavour that the deepest part of the sinus shall have a free discharge, lest any of the humour settle within, which by corroding the contiguous parts yet sound, may make sinuses there. Cases also sometimes occur, in which the skin must be taken off to a more considerable breadth. For when after long distempers, the habit of the whole body has been vitiated, and the sinus is enlarged to a great compass, and the skin is pale; we may take it for granted that it is already mortified, and will be useless: therefore it is more proper to cut it off: and especially if this happen about the larger joints, and the patient has been troubled with a purging while he was confined to his bed, and he gains no flesh by the nourishment he takes. But the excision should be made in the form of a myrtle leaf, that it may heal the more easily. And this rule must constantly be observed, whenever a physician upon any account cuts away the skin. After the pus is discharged, in the armpits and groin there is no need of lint, but a sponge squeezed out of wine must be laid on. In the other parts, if lint is equally needless, a little honey must be infused to cleanse it; then agglutinants are to be applied: if lint be necessary, over it also in like manner ought to be laid a sponge squeezed out of wine in the same way. When lint is necessary, and when not, has been determined elsewhere. The other directions are to be observed when the suppurated tumour is cut, which I gave for one, that has been broke by medicines.