What is the characteristic appearance of erythema multiforme?

Erythema multiforme is characterized by a distinctive appearance known as target lesions. These lesions typically have a central red or purpuric spot surrounded by one or more concentric rings of varying colors, often including shades of pink and pale red. This target or "iris" appearance is a key feature that helps clinicians differentiate erythema multiforme from other skin conditions.

In addition to the target lesions, symptoms can include a range of other presentations, but it is the target shape that is most specific to erythema multiforme. This form of cutaneous reaction can be associated with infections, certain medications, and other conditions but typically presents with these identifiable lesions, making them a hallmark of the disease.

The other options listed lack the specific characteristics associated with erythema multiforme, making them less relevant in identifying this condition.