1. Such dissimilar conditions as eczema, pruritus, urticaria, acne psoriasis, erythema and angioneurotic edema are discussed and summarized, in their relation to allergies. 2. Thirty cases are presented, all of which yielded satisfactorily to treatment of which the chief feature was the prescribing of a diet free from foods to which each individual was sensitive. In several of these cases, additional precautions, resulting from evidence of sensitivity to substances other than foods, were also needed, some only temporarily. 3. In a notable number of the cases presented, long-standing conditions, some not usually connected in the mind of the diagnostician with sensitizations, were cleared up in a remarkably brief period. 4. Several of these patients had been unsuccessfully treated by other methods over varying periods of time.