_Constitutional treatment_, usually tonic in character, is to be based upon general principles; moderate doses of quinia, with one-sixth grain of zinc phosphide, four or five times daily, appear in some cases to have a special value. The accompanying neuralgic pain may be so intense as to require anodynes. _Local treatment_ should be of a soothing and protective character. A dusting-powder of oxide of zinc and starch (to the ounce of which twenty to thirty grains of camphor may be added) proves useful; and over this, in order that the parts be further protected, a bandage or a layer of cotton batting. Oxide-of-zinc ointment, and in those cases in which there is much pain, ointments containing powdered opium or belladonna, or orthoform, may be used. A mild galvanic current applied daily to the parts is often of great advantage, both in its influence upon the course of the eruption and upon the neuralgic pain. The plan, so often advised, of painting the parts with flexible collodion is not to be commended. #Dermatitis Herpetiformis.# (_Synonyms:_ Hydroa Herpetiforme (Tilbury Fox); Herpes Gestationis (Bulkley); Pemphigus Prurigiuosus; Duhring's Disease.) #Give a definition of dermatitis herpetiformis.# Dermatitis herpetiformis is a somewhat rare inflammatory disease, characterized by an eruption of an erythematous, papular, vesicular, pustular, bullous or mixed type, with a decided disposition toward grouping, accompanied by itching and burning sensations, with, as a rule, more or less consequent pigmentation, and pursuing usually a chronic course with remissions. #Describe the erythematous type of dermatitis herpetiformis.# The character of the eruption in the erythematous type resembles closely that of erythema multiforme and of urticaria, especially the former. The efflorescences usually make their appearance in crops, and are more or less persistent; fading sooner or later, however, and giving place to new outbreaks. Vesicles are often intermingled, developing from erythematous and erythemato-papular lesions or arising from apparently normal skin. It may continue in the same type, or change to the vesicular, bullous or other variety. #Describe the papular type of dermatitis herpetiformis.# This is rarely seen as consisting purely of papular lesions, but is commonly associated with the erythematous and vesicular varieties. In a measure it resembles the papular manifestations of erythema multiforme, with a distinct disposition toward group formation. The papules tend, sooner or later, to develop into vesicles, new papular outbreaks occurring from time to time; or the whole eruption changes to the vesicular or other type of the disease. It is not a common type. #Describe the vesicular type of dermatitis herpetiformis.#