SECT. IV.—ON PRURITUS, OR PRURIGO.
The prurigo occurring in old age is not to be thoroughly cured, but may be alleviated by the remedies mentioned below: but that which arises from a cacochymy in other ages, is to be cured by evacuation, being formed by a bilious or pituitous humour that has become putrid, or by a saltish one. It is known by attending to the age, temperament, diet, season of the year, situation, and the like. If, therefore, it appear to prevail in the blood contained in the veins, we must begin with venesection; but if it offend rather by its quality, we must evacuate it by corresponding medicines, and turn our attention to external applications. Wherefore we must use the bath at all times before a meal; and sometimes, after eating a little, it may be used a second time, for the affection is of difficult humectation. They are to be rubbed with the decoction of fenugreek, or of beet, or of barley-meal, or of wild or of garden mallows, or of ptisan; and along with these may be joined the flour of beans, or of lupines, or of myrobalan (ben), or of the detergent ointment called peponaton. If it is protracted, we may use the bath in like manner, and foment with the decoction of sage, of tamarisk, of the herb mercury, of marjoram, of pennyroyal, of bay berries, of the root of the wild cucumber, of capers, of strained ley, of vinegar and brine; and then the parts are to be sprinkled with dried natron, or with the lees of vinegar, or with the composition containing of spuma nitri one sextarius, of rosemary, of sulphur vivum, of each, lb. j, of cimolian earth, lb. ss; or this: of aphronitrum, of sulphur vivum, of burnt alcyonium, equal parts; to be used dry, or with some of the decoctions already mentioned; and, if you please, sprinkle some dried hellebore, without grease. But rub in with vinegar and oil, stavesacre pulverized, or sulphur, or red arsenic, or all together; or mustard, with the refuse of expressed myrobalan, and vinegar and oil; or with snails burnt and triturated with honey or the roots of dock, or the detergent ointments prepared from them, as described under the head of Elephantiasis; or with some of the applications for scabies. If the parts become ulcerated, use the plaster called parygron, or that prepared from pompholyx; or melt oz. j of wax in a cyathus of oil of privet, and sprinkle upon it of sulphur vivum oz. j. Another application for prurigo: Of large nuts in a rancid state, oz. j; of sulphur, oz. j; triturate with the juice of parsley, and use in the bath with much friction. This alone has proved sufficient for the cure of many cases of scabies and prurigo; and green parsley by itself, when pounded and rubbed in while the patient is in the bath, has been of great service: and in like manner, pellitory of the wall and maple rosin dissolved with rose oil, and rubbed in.—Another: Bruise three ounces of pure and very white rice, and, having strained, triturate with strong vinegar until it become of the thickness of the sordes of the oil in baths; and adding separately of sulphur vivum pulverized, oz. j; and mixing properly, use in the bath with much friction. When there is a greater redundance of humours, it will be better to mix the ingredients in equal proportions.
Commentary. See Hippocrates (Aphor. iii, 31); Galen (Comment. et alibi); Oribasius (Morb. Curat. iii, 22); Aëtius (xiv, 20); Actuarius (Meth. Med. ii, 11); Nonnus (237); Alexander Aphrodisiensis (Probl. i, 24); Myrepsus (pluries); Pliny (xxviii, 5); Octavius Horatianus (i, 31); Marcellus (de Med. 4); Isidorus (Orig. iv, 8); Serapion (v, 6); Avicenna (iv, 7, 3, 6); Haly Abbas (Theor. viii, 17, and Pract. iv, 6); Alsaharavius (Pract. xxxi, 5); Rhases (Divis. 121); Avenzoar (ii, 7, 2.)
The prurigo of Dr. Willan is here distinctly described, and a suitable method of treatment recommended.
Hippocrates remarks that prurigo is common in old age. The reason which Galen assigns for this is, that the superfluities of the system are then not properly discharged by the skin. He says in another place, that pruritus may either be produced by external substances, such as nettles, squills, &c., or it may arise from indigestion and the neglect of cleanliness.
Oribasius gives an account of the disease not very different from our author’s. Among other applications, he recommends one consisting of opium mixed with liquid cerate.
Aëtius speaks highly of the sulphureous bath for the cure of this disease.
Actuarius characterizes the disease very well, when he says that it is allied to lichen, and that when rubbed either nothing runs from the place, or some slight humidity of various colour and consistence. He assigns, as a reason for its frequency in old age, that the pores of the skin then get constricted.
Alexander Aphrodisiensis assigns, as the reason why the warm bath proves useful in cases of pruritus, that it dispels the phlegm, which is the cause of the complaint.
Celsus gives a particular account of scabies, but says nothing of prurigo.
Octavius Horatianus recommends us, when the patient is young, to bleed, purge, and use baths medicated with frankincense, natron and sulphur. He also says that the cold bath, and friction with the oil of roses, myrtles, &c., will do much good.
Isidorus uses the term prurigo: “Prurigo vocatur perurendo et ardendo.” Marcellus also uses this term, and recommends much the same substances as the others.
This affection is clearly described by the Arabians, and is rendered pruritus by most of their translators. Serapion recommends us, if there is a sanguineous plethora, to bleed, and then to purge with myrobalans, colocynth, and black hellebore, and along with these the warm bath is to be used, and the liniments for removing the pruritus, containing vinegar, roses, nitre, &c. The prurigo senilis he pronounces to be incurable. Rhases and Avicenna recommend similar remedies. They treat of prurigo and scabies together, and there is no doubt of their alliance. Hence Bateman says that prurigo, when neglected, terminates in scabies. Haly Abbas says that scabies and prurigo arise from a saltish phlegm. Scabies, he says, consists of reddish pustules, which appear most frequently between the fingers and upon the arms. Prurigo, he adds, is apt to run into scabies. He recommends, as a lotion, vinegar with rose-oil, the use of the warm-bath, and other remedies like those of our author. Alsaharavius says that the disease arises from debility of the expulsive faculty of the body or constriction of the pores. He praises highly the hot bath. Avenzoar states that pruritus arises from bile or a sharpness of the blood.
Our author has omitted to treat of phthiriasis, for an account of which see in particular Cælius Aurelianus (de Tard. Pass. iv, 2); also, Aristot. (Hist. An. v, 32); Galen (de Comp. Med. sec. loc. i, 8); Pliny (Hist. Nat. xxvi, 86); Haly Abbas (Pract. iv, 7); Plutarchus (in Vitâ Syllæ.) The authorities quoted by Rhases recommend compositions consisting of stavesacre, white hellebore, arsenic, nitre, sulphur, sublimed mercury, and the like. (Contin. xxxvi.) Antiochus, Herod of Judæa, Philip II of Spain, and many other celebrated personages, are said to have died of phthiriasis. Virey accounts for the disease in the following manner: “Il est, en effet, tel tempérament muqueux, telle dégénération des humeurs lymphatiques, dans le phthiriasis ou la maladie pédiculaire, que ces insectes y trouvent une pâture inépuisable, qu’ils se propagent avec une extrême exubérance sous le peau, pénétrent dans le tissu cellulaire, et établissent d’énormes colonies parmi les ulcères qu’ils y forment.” (Hist. des Mœurs des Anim. ii, 207.) Aldrovandi gives a very full history of phthiriasis. (De Insectis, v.)