Can There be Under Skin Damage?

A laser tech got annoyed when I asked her to go over spots she missed and held down the gun on several spots approximately 4 seconds each, causing welts on my leg. Just because the scars are no longer visible a year later, doesn't mean there's no damage done to the underneath layers of my skin, and does not guarantee I will not have a problem in that area of my skin years from now.

What is the invisible damage skin deep done by laser burns/welts that heal on the surface?

No doctor answers yet