Deep within your dermis, there is something called sebaceous glands and they’re attached to the implantation of the hair and secrete a natural substance called sebum. It’s basically the natural skin oil. It provides the skin with protection and hydration and lubricates the hair. In teenage hood, the activity of these glands is quite high which leads to the secretion of excess sebum causing the hair canal to get clogged and causing severe acne which leaves lesions on the skin.
Acne scars start to appear when the acne is treated and gone after the inflammatory stage. Sometimes, at the end of puberty, the acne gets so intense up to a point that it distorts the skin which makes these scars look even worse.
These scars can be very bad-looking and aesthetically unpleasant which can really affect one’s physical appearance and psychological well-being.