[Rx] Ac. salicylici, ...................... gr. x-xl Glycerini, ........................... [dram]ss-[dram]j Lanolin, Petrolati, .................. [=a][=a] [Oz]ss In severe cases of ichthyosis hystrix it may be necessary, also, to employ caustics or the knife. #What systemic treatment would you prescribe?# Constitutional remedies are practically powerless; occasionally some good is accomplished by the internal administration of linseed oil and jaborandi. #Onychauxis.# (_Synonym:_ Hypertrophy of the Nail.) #Describe onychauxis.# Onychauxis, or hypertrophy of the nail, may take place in one or all directions, and this increase may be, and often is, accompanied by changes in shape, color, and direction of growth. One or all the nails may share in the process. As the result of lateral deviation of growth, the nail presses upon the surrounding tissues, producing a varying degree of inflammation--_paronychia_. #What is the etiology of hypertrophy of the nail?# The condition may be either congenital or acquired. In the latter instances it is usually the result of the extension to the matrix of such cutaneous diseases as psoriasis and eczema; or it is produced by constitutional maladies, such as syphilis. #Give the treatment of hypertrophy of the nail.# Treatment consists in the removal of the redundant nail-tissue by means of the knife or scissors; and, when dependent upon eczema or psoriasis, the employment of remedies suitable for these diseases. When it is the result of syphilis, the medication appropriate to this disease is to be employed. In paronychia the nail should be frequently trimmed and a pledget of lint or cotton be interposed between the edge of the nail and the adjacent soft parts; astringent powders and lotions may often be employed with advantage; and in severe and persistent cases excision of the nail, partial or complete, may be found necessary. #Hypertrichosis.# (_Synonyms:_ Hirsuties; Hypertrophy of the Hair; Superfluous Hair.) #What is meant by hypertrichosis?# Hypertrichosis is a term applied to excessive growth of hair, either as regards region, extent, age or sex. #Describe the several conditions met with.# The unnatural hair growth may be slight, as, for instance, upon a naevus (_naevus pilosus_); or it may be excessive, as in the so-called hairy people (_homines pilosi_); or it may also appear on the face, arms and other parts in females, resulting from a hypertrophy of the natural lanugo hairs. #State the causes of hypertrichosis.# Hereditary influence is often a factor; the condition may also be congenital. If acquired, the tendency manifests itself usually toward middle life. In women, it is not infrequently associated with diseases of the utero-ovarian system; in many instances, however, there is no apparent cause. Local irritation or stimulation has at times a causative influence.