You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The ‘Iris lesions ’ are pathognomonic of and explain in detail?
Erythema Multiforme
The classic skin lesion consists of a central blister or necrosis with concentric rings of variable color around it called typical “target” or “iris” lesion that is pathognomonic of EM;
variants are called “atypical target” lesions (Figure 4-16). The skin may feel itchy and burnt. Postinflammatory hyperpig - mentation is common in dark-skinned individuals and may be worsened by sun exposure.