A primary VZV infection causing a generalized vesicular rash in multiple stages of evolution ('dewdrops on a rose petal'), not confined to a single dermatome.
A widespread herpes simplex virus infection superimposed on pre-existing eczema, leading to 'punched-out' erosions and vesicles not in a dermatomal pattern.
Can cause a grouped vesicular eruption but typically recurs in the same localized (non-dermatomal) area, such as the lips or genitals.
A bacterial infection causing honey-colored crusts, which can be bullous, but lacks the preceding neuropathic pain and strict dermatomal distribution of shingles.
An itchy, papular or vesicular rash triggered by sun exposure in photosensitive areas, not a painful, dermatomal eruption.