Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson

The lesions--which vary from a slight superficial scorching to complete
charring of parts--are most evident at the points of entrance and exit
of the current, the intervening tissues apparently escaping injury.

The more superficial degrees of electrical burns differ from those
produced by heat in being almost painless, and in healing very slowly,
although as a rule they remain dry and aseptic.