Understanding Scars: Types, Causes, and Healing

Scars are a natural part of the healing process, but not all scars are the same. Some fade with time, while others become raised, discolored, or tight. Understanding how scars form - and why they look and behave differently - is the first step toward effective scar care.

How the Skin Heals After an Injury

When the skin is injured, the body begins a complex repair process that occurs in three main stages:

1. Inflammation: Blood vessels constrict to stop bleeding, then expand to allow healing cells to enter the area.
2. Proliferation: New tissue forms, and collagen fibers are produced to close the wound.
3. Remodeling: Collagen reorganizes and strengthens over time.

Scars form during the remodeling phase. If collagen production is excessive, uneven, or disrupted, the resulting scar may become raised, indented, or stiff.

Types of Scars and What They Mean

Hypertrophic Scars

Hypertrophic scars are raised, thick scars that remain within the boundaries of the original wound. They often develop after surgery, burns, or trauma.

Characteristics:

• Red or pink
• Raised and firm
• May improve over time

These scars often respond well to silicone scar tape, which helps regulate collagen production and flatten raised tissue.

Keloid Scars

Keloids form when scar tissue grows beyond the original injury site. They are more common in individuals with darker skin tones and often have a genetic component.

Characteristics:

• Extend beyond the wound
• Firm, shiny appearance
• Can be itchy or painful

Early scar care is crucial for preventing keloids from worsening.

Atrophic Scars (Acne Scars)

Atrophic scars occur when the skin fails to produce enough collagen, leading to indentations.

Characteristics:

• Depressed or sunken appearance
• Common after acne or chickenpox
• Often require long‑term treatment

Contracture Scars

Contracture scars are most common after burns and can restrict movement by tightening the skin.

Characteristics:

• Tight, shiny skin
• Reduced flexibility
• May affect underlying muscles or joints

Factors That Affect Scarring

• Age: Younger skin produces more collagen, increasing the risk of raised scars.
• Genetics: Family history plays a significant role.
• Location: Areas under tension (chest, shoulders) scar more aggressively.
• Skin tone: Darker skin tones are more prone to hyperpigmentation and keloids.

When Scars Need Medical Attention

Seek professional care if a scar:

• Continues to grow
• Causes pain or itching
• Restricts movement
• Changes color or texture rapidly

Early intervention improves outcomes significantly.