It has been noted independently by both of us that a definite relationship exists between many attacks of pruritus ani and exacerbations either of seborrheic eczema of the scalp, ear canals, eyelids, umbilicus or axillas or of dermatophytosis of the feet. What relationship exists between these conditions and how to-determine the exact status of one to the other are problems which become increasingly difficult, because of the multiplicity of theoretic, physical and personal problems involved. We have attempted, by the use of material gathered from other published work and from our own observations of 145 cases of pruritus ani, to explain on an allergic basis what seem to be the fundamental factors involved in anal itching.
In view of the difficulty experienced in gaining the cooperation of the patient when the primary focus alone was treated without giving some immediate relief to the pruritus, we thought it advisable to treat both the distant and the local involvement until a symptomatic cure was obtained. The patients were then carefully instructed to watch for recurrent symptoms of pruritus ani, seborrheic eczema or
FOSTER PD, HILL MR. PRURITUS ANI AND ITS RELATIONSHIP TO SEBORRHEIC ECZEMA AND DERMATOPHYTOSIS. Arch Derm Syphilol. 1940;41(4):699–706. doi:10.1001/archderm.1940.01490100063011
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