Always favorable; the eruption usually disappears in ten days to three weeks, although in rare instances new crops may appear from day to day or week to week, and the process last one or two months. One or more recurrences in succeeding years are not uncommon. Those rare cases in which vesicular or bullous lesions are also seen on the lips and in the mouth, are more prone to longer duration and to more frequent recurrences.

What remedies are commonly prescribed in erythema multiforme?

Quinin, and, if constipation is present, saline laxatives. Calcined magnesia is valuable as a laxative. Intestinal antiseptics, such as salol, thymol, and sodium salicylate, are valuable in cases probably due to intestinal toxins. In those exceptional instances in which there may be associated febrile action and rheumatic swelling of the joints, the patient should be kept in bed till these symptoms subside. Local applications are rarely required, but in those exceptional cases in which itching or burning is present, cooling lotions of alcohol and water or vinegar and water are to be prescribed. The vesicular and bullous types demand mild protective applications, such as used in eczema and pemphigus.

Erythema Nodosum.

(Synonym: Dermatitis contusiformis.)

What is erythema nodosum?

Erythema nodosum is an inflammatory affection, of an acute type, characterized by the formation of variously-sized, roundish, more or less elevated erythematous nodes.

Is there any special region of predilection for the eruption of erythema nodosum?

Yes. The tibial surfaces, to which the eruption is often limited; not infrequently, however, other parts may be involved, more especially the arms and forearms.

Describe the symptoms of erythema nodosum.