

Persistent scab-like spot on forehead that never heals?
My dad is 54 and works/lives in the countryside, so he gets a lot of sun exposure and never really uses SPF. Last year he developed this small spot/scab on his forehead. According to him, it never fully goes away, if he removes the crust/scab, it just comes back again in the same place.
Does anyone know what this could possibly be?