1 Answers
Consultant Staff answered 5 years ago
Acne scars are the dark and sometimes swollen pits left in the skin long after the pimple has healed and are divided into four categories according to appearance and cause: ice pick (small pits), boxcar (scars that have sharp edges), rolling (caused by damage underneath the epidermis) and hypertrophic (raised and bumpy because of excess scar tissue under the skin).