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Additionally, impetigo characteristically has golden yellow crusts, and herpes simplex infection is usually more painful. An 11-year-old Caucasian boy presented with a slightly pruritic rash involving his ears and face that appeared 1 day after playing soccer outdoors. In case of doubt, ancillary testing such as cultures or polymerase chain reaction (PCR) can be helpful. [Extracted from the article]

Furthermore, histologic examination may show neutrophils but not a lichenoid lymphocytic infiltrate.4 Violaceous papules with Wickham's striae would be typically seen in lichen planus.4 Secondary syphilis may manifest as a maculopapular rash with acral involvement, but a positive serologic test would yield the diagnosis. Palmoplantar involvement is known to occur but rarely reported,1,2 occasionally as plantar hyperkeratosis mimicking palmoplantar psoriasis, but in most cases acral papules mimicking secondary syphilis.1-4 Diagnosis is made by correct clinicopathological correlation. Differential diagnosis of PLC is extensive and includes psoriasis, lichen planus, drug and viral exanthemas (to which COVID-19 has recently been added), lymphomatoid papulosis, and characteristically secondary syphilis, especially when there is volar involvement.1,2,5 Psoriasis may exhibit distinctive desquamative guttate papules but also nail dystrophy, which is not seen in PLC. [Extracted from the article]

However, during the last months we have seen several cases of actinic keratosis neglecta in patients denying the use of sunscreens but using a specific toning shampoo for blonde and white hair. Furthermore, the recognition of Acid Violet in patients with actinic keratosis neglecta is important to advise the patient to remove the product properly as it may cause sensitization and development of allergic contact dermatitis. [Extracted from the article]