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Acne Scars
Acne scars are the textural marks, dips or raised areas, left behind after inflammatory acne heals. A crucial first point: a scar is not the same as a post-acne mark. A scar is a change in the skin's collagen and relief, while a brown or red mark is a change in colour. Telling them apart guides the right care.
Why a breakout leaves a dent
When an inflammatory breakout, especially a nodule or cyst, reaches deep into the dermis, it destroys collagen, the skin's structural framework. As the skin heals, how it rebuilds that collagen decides the result. Too little leaves a depressed scar, the most common kind; too much raises the skin. This is why calming acne early limits the scars left behind.
Depressed acne scars also come in recognizable shapes, often called ice pick, boxcar and rolling, depending on whether they are narrow and deep, wide with sharp edges, or broad and softly indented. The shape helps guide which treatment works best, which is why an assessment looks at the type, not just the presence, of scarring.
How do acne scars develop?
Acne scars form when deep inflammation damages collagen and the skin repairs unevenly. Whether a scar ends up sunken or raised, and what shape it takes, depends on how that repair unfolds. Understanding these factors matters, because scar type, not just its presence, determines which treatment helps and why active acne must be controlled first.
Deep inflammation
Scars begin with depth. Surface breakouts rarely scar, but when inflammation from a nodule or cyst reaches the dermis, it destroys collagen and disorganizes the skin's framework there. The deeper and stronger the inflammation, the more structural damage, which is why severe, inflammatory acne carries by far the highest scarring risk.
How the skin rebuilds
During healing, the skin lays down replacement collagen. If it rebuilds too little to fill the loss, the surface sinks into a depressed scar, the most common acne scar. If it overproduces, the skin rises into a raised scar. The same injury can heal differently from one person and one spot to the next.
Picking and squeezing
Manipulating a breakout deepens and prolongs the inflammation, which means more collagen destroyed and a higher chance of a permanent scar. Each squeeze can also push inflammatory contents further into the dermis. This is the direct biological reason behind not picking: it turns a temporary blemish into a lasting textural mark.
Scar versus mark
Not every leftover is a scar. A flat brown mark is post-inflammatory pigment, and a flat red or purple mark is dilated vessels; both are colour, not texture, and respond to different approaches. A true scar is a change in relief and collagen. Sorting the two is what points to the right treatment.
How to Prevent
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