I now approach what is really the most difficult portion of my task; for, although it would be easy enough to write copiously on the treatment of neuralgia, it is extremely difficult to keep a just medium between the opposite extremes of undue meagreness and of useless profusion of detail in the handling of this subject. There are also difficulties connected with the present uncertain and transitional state of opinion, even among high authorities, as to the value of particular remedies, and even of large groups of remedial agents, altogether there has been more hesitation in my mind as to this part of the present work than about any other, and the present chapter has been rewritten more than once. I mention this only to account for what there may very likely be found in it--an imperfect literary style such as too commonly marks work which has been repeatedly patched and corrected. At the same time, it should be said that my hesitation does not apply to the main principles of treatment which will be recommended below; it proceeds rather from the fear of seeming to ignore from carelessness modes of treatment which are still much used, but which I have really rejected, because, after full trial, they appeared to me valueless. Space is, after all, limited, and a complete account of all the remedies for neuralgia in vogue, in English and Continental clinics, would of itself fill a large volume. The treatment of neuralgia may be divided into four branches: (1) Constitutional remedies; (2) narcotic-stimulant remedies; (3) local applications; (4) prophylaxis. 1. Constitutional treatment must be subdivided, as (_a_) dietetic, (_b_) anti-toxic, and (_c_) medicinal tonic. (_a_) The importance of a greatly-improved diet for neuralgic patients is a matter which is more fully appreciated by the English school of medicine than by either the French or the German; it has, for instance, very much surprised me to notice the almost entire silence of Eulenburg on this topic. For my part, the opinions expressed three years ago[35] on this matter have only been modified in the direction of increasing certainty; I have learned by further experience that the principle is even more extensively applicable than I had supposed.