Since Duhring, in 1884, called the attention of dermatologists to a group of eruptions of the skin under the name of dermatitis herpetiformis, interest in these eruptions has greatly increased, because many affections of this kind could find their right nosological place in dermatology. Many of these cases were formerly confounded with erythema multiformis, others with herpes iris, others with pemphigus; impetigo herpetiformis hebræ remaining a peculiar eruption out of any definite nosological class. As the bulla was characteristic of pemphigus, so every bullous eruption was characterized as such, and on account of the pruritus, the adjective of pruriginosus was added. Duhring's work consisted in definitely establishing the general symptoms which constitute the type of these eruptions and thus refer them all to one group.
1. Polymorphism of the eruption.
3. Chronic course and relapse.
4. Relative general good feeling:
Certainly the disease is not a new