Understanding Scars and the Anxiety Behind Them

Scars are a natural part of the body's healing process, yet they often cause significant concern for individuals who want to minimise their appearance after an injury, surgery, or other skin trauma. The anxiety surrounding how a scar will look, whether it will become raised or discoloured, and what can be done to improve its final outcome is completely understandable. This article aims to address those concerns by providing a clear, evidence-informed overview of how scars form, how to prevent abnormal scarring from the moment the skin is injured, and what treatment options are available for mature scars. By understanding the biology of wound healing and the practical steps that can be taken at each stage, individuals can feel more empowered and less anxious about the scarring process.

What Is a Scar and How Does It Form?

When the skin is injured, a complex wound healing process begins. A specialised cell called the fibroblast becomes activated and lays down collagen in a pattern that is distinctly different from the normal collagen found in uninjured skin. Unlike the flexible, organised collagen network of healthy dermis, scar tissue is composed of dense, often disorganised collagen fibres. This is why scars typically feel firmer or harder to the touch compared to the surrounding skin.

Scars can present in several different forms depending on how the body's healing response is regulated:

  • Normal, flat scars remain within the original boundaries of the wound.
  • Atrophic scars appear sunken or depressed below the surface of the surrounding skin.
  • Hypertrophic scars are raised but stay confined to the area of the original wound.
  • Keloids are a more aggressive form of scarring where scar tissue extends beyond the wound margins, growing into previously uninjured skin.

Under microscopic examination, these different scar types show variations in collagen organisation. Normal scars have a more organised collagen structure, while hypertrophic and keloidal scars display thick, disorganised, "bubblegum-like" collagen bundles.

The wound healing process itself occurs in three overlapping phases. The inflammatory phase begins immediately after injury and lasts several days. This is followed by the proliferative phase, during which new tissue forms. Finally, the remodelling phase can continue for many months. It is important to recognise that a scar does not reach its final appearance until approximately one year after the injury. At that point, scar tissue is only about 80% as strong as normal skin, and the individual can make a final assessment of whether further treatment is desired.

Preventing Scars: The Critical First Weeks

One of the most common misconceptions about wound care is that wounds should be left open to air and allowed to dry out. In reality, keeping a wound moist is one of the most important factors in promoting optimal healing and minimising scar formation. When a wound is allowed to dry, it forms a hard scab, which actually delays the healing process and can lead to a less favourable cosmetic outcome.

Proper wound care begins with gentle cleaning. The only cleansing agent needed is mild soap and water. Products such as hydrogen peroxide and rubbing alcohol should be avoided, as they can damage healthy tissue and delay wound healing. After cleaning, the wound should be covered with a pure, occlusive ointment. The purpose of this ointment is to create a moist environment that supports the migration of skin cells across the wound surface. This allows the cells to effectively "leapfrog" over one another and close the wound more efficiently. Maintaining this moist environment with a simple occlusive agent has been shown to produce substantially better healing outcomes compared to allowing the wound to dry.

It is also worth noting that certain topical products marketed for wound care are unnecessary and may even be counterproductive. Antibiotic ointments containing multiple active ingredients carry a risk of causing contact allergic reactions and do not provide additional benefit for most clean surgical or injury wounds. Similarly, pure vitamin E in concentrated form has not been shown to improve wound healing and may actually be detrimental. For the vast majority of routine wounds, a simple occlusive ointment is the most effective and safest choice. The only exception would be if a physician has specifically prescribed a particular antibiotic ointment based on the individual's unique clinical situation.

Early Scar Management: From Two Weeks to Six Months

Once the wound has closed and sutures have been removed (typically around two weeks after injury), the focus shifts to managing the maturing scar. During this period, which extends roughly to six months after injury, the scar is still actively remodelling. This is the ideal window to use topical scar treatments that can influence the final outcome.

Silicone-Based Products

The first and most extensively studied category is silicone-based products. Silicone can be applied as a gel or as a reusable adhesive sheet that sticks directly over the scar. The mechanism by which silicone works is not fully understood, but it is believed to create a hydrating, occlusive barrier that normalises collagen production and reduces excessive scar tissue formation. Multiple clinical studies have demonstrated the benefits of silicone for improving scar colour, thickness, and overall appearance. Silicone remains the preferred first-line topical treatment for maturing scars.

Onion Extract Products

The second category includes products containing onion extract. Some in vitro studies have suggested that onion extract can inhibit fibroblast activity, which in theory could temper excessive scar growth. Clinical studies have yielded mixed results, with some showing benefit and others not. One study directly comparing onion extract to silicone found comparable outcomes, though it is worth noting that this study had industry sponsorship. Overall, the body of evidence supporting silicone is larger and more robust, making it the preferred choice.

Retinoids

Retinoids may also play a role in scar management. Retinoids can help remodel collagen and are particularly useful for addressing the hyperpigmentation that often accompanies scars. However, retinoids can be irritating and should be introduced cautiously, especially on healing skin.

Treatment Options for Mature Scars

Once a scar has fully matured, typically after six months to a year, topical treatments alone are unlikely to produce further significant improvement. At this stage, procedural interventions performed by a dermatologist or other qualified medical professional offer the greatest potential for visible change. These treatments work by creating controlled injury to the scar tissue, stimulating new collagen formation and remodelling.

Microneedling

Microneedling is a procedure in which a device containing many fine needles is rolled or stamped over the scarred area. The needles create tiny punctures in the skin, triggering a fresh wound healing response that can help break up disorganised scar collagen and replace it with more normal tissue. A more advanced version, radiofrequency microneedling, combines the mechanical injury of the needles with the application of heat, which causes additional contraction and tightening of the tissue.

Chemical Peels

By applying a carefully selected acid solution to the skin, the top layers of the scar can be removed, allowing healthier skin to regenerate. The depth of the peel can be adjusted based on the scar's characteristics and the individual's skin type.

Laser Therapy

Laser therapy offers some of the most powerful tools for scar revision. Different lasers target different components of a scar. Vascular lasers are effective for early, red or pink scars because they specifically target the tiny blood vessels supplying the scar tissue. Reducing this redness can make the scar less noticeable. Fractionated carbon dioxide (CO2) lasers work by creating an array of microscopic holes in the skin, similar to microneedling but with the additional effect of heating the tissue. This stimulates a robust remodelling response and can significantly improve scar texture and blending with surrounding skin.

It is common to combine multiple modalities for the best results. For example, a thick, red scar might first be treated with a vascular laser to reduce redness, followed by a CO2 laser or microneedling to address the thickness. Because different clinics and practitioners have access to different technologies, it is advisable to seek out a provider who offers a range of treatment options. Each treatment session typically produces incremental improvement rather than complete elimination of the scar, with multiple sessions often required.

Special Considerations for Keloids

Keloids present a unique challenge because of their aggressive tendency to grow beyond the original wound boundaries and their high recurrence rate even after surgical removal. Standard topical treatments and laser therapies are often insufficient for keloids. Instead, a more multifaceted approach is required.

Intralesional corticosteroid injections are a mainstay of keloid treatment. Steroids work by suppressing inflammation and reducing fibroblast activity, causing the keloid to soften and flatten over time. Multiple injection sessions are usually needed. Other injectable agents may also be used in resistant cases.

For keloids located on certain body sites, pressure therapy can be helpful. This is most applicable to earlobe keloids, where specialised pressure earrings or clips can be worn to physically compress the scar and inhibit its growth.

When a keloid is surgically removed, the risk of recurrence is very high — some studies suggest a recurrence rate of over 70% if no additional treatment is performed. To address this, a technique called superficial radiation therapy can be applied immediately after surgical excision. Typically, three short sessions of radiation are delivered over three consecutive days. The radiation inhibits mast cells from releasing chemical mediators that would otherwise stimulate fibroblasts to produce excessive scar tissue. When surgical excision is combined with this radiation protocol, the recurrence rate drops dramatically, with studies reporting rates as low as 3–4%. This approach uses superficial radiation, which penetrates only the top layers of the skin and does not affect deeper structures, making it a safe option for this specific indication.

A Practical Timeline for Scar Management

Phase Timeframe Key Actions
Acute wound care First 2 weeks Clean with soap and water; keep moist with a simple occlusive ointment; avoid hydrogen peroxide, alcohol, and unnecessary antibiotic preparations.
Early scar management 2 weeks – 6 months Begin silicone gel or sheet therapy; add retinoids cautiously if hyperpigmentation is a concern.
Mature scar treatment 6 months – 1 year+ Consult a specialist for procedural options: microneedling, chemical peels, vascular or CO2 laser therapy, or combined modalities.
Keloid management Ongoing as needed Corticosteroid injections; pressure therapy; surgical excision combined with superficial radiation therapy to minimise recurrence.

It is important to remember that every individual heals differently, and there is no guarantee that any particular treatment will eliminate a scar completely. The goal is incremental improvement — each intervention can make the scar less noticeable, softer, flatter, and better matched to the surrounding skin colour and texture. By understanding the science of wound healing and following a stepwise, evidence-informed approach, individuals can significantly improve their scar outcomes and reduce the anxiety associated with the healing process.