BOOK VII. 3. 2-4. 1

has been let out. And one cause for anxiety is if the wound is insensible to corrosives. But while it is chance that makes the signs point now one way, now another, it is the practitioner’s part to strive to bring about healing. Therefore whenever it is dressed, the abscess cavity should be washed out, with wine mixed with rain water or with a decoction of lentils, when the discharge seems to need checking; with honey wine when cleaning is required; after which it is dressed as before. When the discharge appears to be checked, and the cavity clean, then is the time to help the growth of flesh, both by irrigating with equal parts of wine and honey, and by laying on a sponge soaked in wine and rose oil. Although the growth of flesh is helped by these medicaments, this is better attained, as I have said elsewhere, by a careful regimen; this consists, after the cessation of the fever and a return of appetite, in an occasional bath, gentle rocking daily, food and drink suitable for making flesh. These prescriptions all apply to abscesses which have burst under medicaments; but they have been held over to this place because it is scarcely possible to cure a large abscess without using the knife.

4. Again, for fistulae which penetrate so deeply that a medicated bougie cannot be passed down to the ends, or those which are tortuous or multiple, surgery has the advantage over medicine; and there is less trouble if the fistula runs horizontally under the skin, than when it tends directly inwards. Therefore if it lies horizontally under the skin, a probe should be introduced and cut down upon. When there are bends, these are followed up in