Sun-induced lentigo
Actinic or sun-induced lentigo should not be confused with senile lentigo, as it can appear at any age.It is a result of sun exposure, whether the subject has caught a tan or not. Actinic lentigo is more likely to develop on certain skin types, particularly on exposed areas: The face, décolleté, forearms and backs of the hands. (www.medicopedia.net)