What are Compound Nevi

Origin: both at the dermoepidermal junction and within the dermis
Appearance: slightly or markedly raised pigmented papules
Surface: smooth or slightly papillomatous
Border: have an irregular border but are symmetric
Special features: Hair may be present, the center tends to be more heavily pigmented than the periphery, If a white halo appears at the periphery of the lesion, it is referred to as a halo nevus
Progress: tend to increase in thickness and pigmentation in late childhood and adolescence.