I use the term "eczema"1 generically, for certain dermatoses herein considered were formerly included under that heading. LITERATURE A search of the literature bearing on the relation of metabolism to skin disorders will give little practical help. In 1913, Johnston made the statement:2 "There need be no hesitation in saying that eczema is not concerned with the metabolism of the carbohydrates or fats." However, two years later Pels3 studied the blood-sugar in fifty cases, including those from cases of the following conditions: acne vulgaris, psoriasis, eczema of various types, urticaria, erythema multiforme, furunculosis, hyperhidrosis, dermatitis herpetiformis, alopecia areata, rosacea, ecthyma and pemphigus foliaceus. His findings varied from 0.07 to 0.156 per cent, of blood sugar, averaging 0.107 per cent., and showed practically no increase above the normal blood sugar value, although tending toward the higher percentage limit. He concluded that "since the dermatologic manifestations of diseased conditions