Aphorism 194

It is not useful, either in acute local diseases of recent origin or in local affections that have already existed a long time, to rub in or apply externally to the spot an external remedy, even though it be the specific and, when used internally, salutary by reason of its homoeopathicity, even although it should be at the same time administered internally: of the acute topical affections (e.g. inflammations of individual parts, erysipelas, &c,) which have not been caused by external injury of proportionate violence, but by dynamic or internal causes, yield most surely to internal remedies homoeopathically adapted to the perceptible state of the health present in the exterior and interior, selected from the general store of proved medicines, (Note: As for instance, aconite, rhus, belladonna, mercury, &c.) and generally without any other aid; but if these diseases do not yield to them completely, and if there still remain in the affected spot and in the whole state, notwithstanding good regimen, a relic of disease which the vital force is not competent to restore to the normal state, then the acute disease was (as not infrequently happens) a product of psora which had hitherto remained latent in the interior, but has now burst forth and is on the point of developing into a palpable chronic disease.