What Are Acne And Acne Scar Treatments?

Types and Characteristics of Acne Scars

Acne scars are permanent tissue changes that develop after the inflammatory process in the skin. These scars may appear in different shapes and depths, and different treatment methods may be applied depending on the scar type. In the table below, the most common acne scar types and their main characteristics are compared.

In summary, acne scars can be classified as depressed (atrophic) or raised (hypertrophic/keloid). Correctly identifying the scar type is important when planning the appropriate treatment method.

What Is an Atrophic Acne Scar (Depressed Scar)?

Atrophic acne scars are depressed scars that occur due to collagen loss in the skin. They are among the most common types of acne scars and usually develop after severe or deep acne. When the skin cannot produce sufficient and balanced collagen during the healing process, tissue loss occurs and a sunken appearance forms on the skin surface.

Atrophic scars are divided into three subtypes. This classification is important for determining the appropriate treatment plan:

• Ice pick scars: Narrow, deep scars that resemble needle punctures.
• Boxcar scars: Depressions with sharp edges that appear round or oval like craters.
• Rolling scars: Broad, wave-like scars that create an uneven skin surface.

Because each subtype varies in depth and width, the treatment strategy is also determined accordingly. In particular, fibrotic bands beneath the skin play an important role in rolling-type scars.

What Are Hypertrophic and Keloid Acne Scars?

Hypertrophic acne scars are raised and firm scars that occur when the skin produces excessive collagen during the healing process. They are most commonly seen on the chest, back, and jawline. In these types of acne scars, the issue is not tissue loss but rather excess tissue formation. The lesion usually remains limited to the area where the acne occurred.

Keloid scars differ from hypertrophic scars because they can extend beyond the original lesion and spread into surrounding tissue. Genetic predisposition is an important factor in the development of these scars. The treatment of keloid acne scars is completely different from the treatment of depressed scars, as the goal is to reduce collagen production and control the raised tissue.

What Is the Difference Between an Acne Mark and an Acne Scar?

Not every color change that occurs after acne is considered a scar. Acne marks usually appear as redness after inflammation (post-inflammatory erythema) or brown discoloration (post-inflammatory hyperpigmentation). These marks may fade over time, and in most cases the structural integrity of the skin remains intact.

In contrast, an acne scar occurs when the skin tissue is structurally damaged and presents as a visible depression or raised area on the skin surface. Irregularities that can be felt when touching the skin are often an indication of a scar. Distinguishing between these two conditions is extremely important for proper acne scar treatment planning.

Which Type of Acne Scar Is the Most Difficult to Treat?

The difficulty of treatment depends on the type and depth of the acne scar. Ice pick scars are generally considered more resistant to treatment due to their deep and narrow structure. This is because the damage extends into the deeper layers of the dermis, and superficial treatments alone may not be sufficient.

Rolling scars, on the other hand, may require different techniques because they are associated with fibrotic bands beneath the skin. In hypertrophic and keloid scars, the problem is excessive collagen production, so the treatment approach is entirely different. Therefore, there is no single answer to the question of which acne scar is the most difficult to treat. However, deep scars that have existed for a long time usually require a longer treatment process. Correct classification and a personalized treatment approach are the most important factors determining treatment success.