Thank you for your query.
I would suggest that you go in for surgical removal which will be a cleaner, better and a faster way of removal of the lesion. Cauterization
, whether chemical or electrical, also causes pain and the scar will be not be a clean one. Local anaesthesia will ensure that pain is minimal, if any.
I hope I have answered your query to your satisfaction.
Wishing your son a speedy recovery.