What Are Acne And Acne Scars? How Do They Form?

What Causes Acne?

Acne develops through four main mechanisms: increased sebum production, clogged pores, proliferation of Cutibacterium acnes bacteria, and inflammation. Hormonal changes in particular, such as puberty, menstrual irregularities, and polycystic ovary syndrome, as well as stress, genetic predisposition, and the use of inappropriate cosmetic products may trigger acne formation. For this reason, acne treatment planning should focus not only on the skin surface but also on the underlying causes.

Acne vulgaris is not only an adolescent condition. Today, adult acne is quite common and may especially appear as resistant lesions along the jawline and lower cheek area. Incorrect product use, excessive peeling procedures, or the habit of squeezing pimples may increase inflammation, worsen acne severity, and raise the risk of acne scar formation.

How Do Acne Scars Form?

An acne scar forms when the inflammatory process in the skin reaches the dermis layer and damages collagen tissue. In severe and deep acne lesions, as inflammation increases, the skin attempts to repair the damage by producing collagen; however, if this process is not balanced, either tissue loss (depressed scar) or excessive tissue production (raised scar) may occur. These permanent structural changes are defined as scars.

The risk of scarring is especially higher in deep lesions such as nodular and cystic acne. In addition, squeezing pimples, improper chemical treatments, and delayed treatment may increase acne scar formation. Therefore, early and appropriate intervention during the active acne phase can significantly reduce the future need for acne scar treatment.

What Are the Types of Acne Scars?

Types of acne scars are classified according to the structural changes they create in the skin. In order to plan the correct acne scar treatment, the scar type must first be identified. This is because not every scar type responds to the same treatment in the same way.

The most common types of acne scars are:

• Ice pick scar: Deep and narrow depressed scars that resemble needle punctures.
• Boxcar scar: Wider scars with clearly defined edges and a crater-like appearance.
• Rolling scar: Wavy depressions that create an uneven appearance on the skin surface.
• Hypertrophic / keloid scar: Raised, firm scars that protrude above the skin surface.

This classification plays a critical role in determining the method to be used in acne scar treatment. For example, rolling scars require different approaches, while ice pick scars may require different techniques. For this reason, a personalized evaluation is essential.

Do Acne Scars Go Away on Their Own?

Acne marks may lighten over time; however, true acne scars generally do not disappear completely on their own. This is because the issue is not only discoloration, but structural damage to the skin tissue. Depressed or raised acne scars tend to remain permanent unless treated.

Nevertheless, it is possible to achieve significant improvement in the appearance of scars with modern acne scar treatments. The goal is to regulate collagen production again and make the skin surface smoother. Proper treatment started early not only improves aesthetic appearance but can also positively affect a person’s self-confidence.