A review of the literature reveals no report of a case of urticaria due to the ingestion of blood or blood-containing foods. A recent article considered the use of animal blood for the nutrition of the German people within the scope of the second four year plan. The investigation of the findings in the following reported case is of especial interest because not only (1) is it the first such case to be reported in the literature indicating that the use of animal blood in the diet is not without its dangers but (2) it was during the nutritional allergic state of the patient that cold urticaria developed. REPORT OF CASE W. L., 40 years old, a helper in a milk concern, was admitted to the hospital complaining of urticaria. He had had measles as a child, malaria in 1917 and again in 1931 and typhoid fever in 1918; he