[31] This likewise affects the system, and produces syncope, if the mechanical support be withdrawn suddenly from the parts.
Sometimes, after an abscess has burst, or been opened, it continues in a progressive state of amendment for some time, and then becomes stationary, continuing to discharge matter without healing. This either takes place from the whole surface, or from a particular part of it, forming a sinus, the treatment of which will afterwards be mentioned, being the same with those which succeed abscesses which are originally unhealthy.
After an abscess bursts, the proper application is a warm poultice[32], which should be continued in general as long as there is any stool, or hard margin; that is to say, until the increased quantity of diseased organic particles, which were formed during the inflammation, be absorbed, and the vessels at that part have either assumed the suppurative or natural action. After this, the orifice ought to be covered with a slip of lint, and moderate pressure applied over the surface of the abscess[33], by which the sides are kept in constant contact, and reunion is accelerated. Good diet is also necessary, for we thus increase the powers of recovery, or keep up a proper action, and renew the vital principle, the quantity of which has been lessened during the inflammation, both by the continuance of a state of overaction, and by the remedies which are employed to diminish the action; for a state of real and permanent weakness is thus induced.
[32] This poultice does not require to be so hot, nor changed so frequently, as before the full formation of matter.
[33] If this produces pain, we may in general conclude that it has been used too soon.
It sometimes happens, that suppuration takes place very slowly, and the action seems to be performed with little vigour. In this case, if the abscess be allowed to burst of itself, we both lose time, and are often, in the end, disappointed in a cure, the healing process not taking place. It is therefore useful, in these cases, to have recourse to other agents besides heat. If the pain be trifling, and the suppuration be what may be called chronic, or approaching to it, we will perhaps succeed, by applying gentle pressure on the abscess, by means of a thin roller, and laying a warm poultice over this. But, when this fails to increase the action, we ought to pass a seton, by which we evacuate the matter, and keep up the subsequent action to a degree sufficient for producing recovery. In doing this, however, it is necessary to attend to the state of the tumor; because, if, in every instance, we pass it from the highest to the lowest part, we shall sometimes make the part give way in a third place. If, for instance, the abscess be much thinner at the apex than elsewhere, or, if the action have made considerable progress toward the surface, then the stimulus of the action increases the performance of the natural process which was going on, and the action continues to extend itself until the part gives way. In these cases, then, we ought to pass the seton from the thin part to the lowest part; and this, in general, will, from the sympathy of association, be sufficient to excite the action of the whole internal surface.