Can Old Scars Be Treated? A Clinical Perspective on Managing Mature Scars

Scars are often thought of as permanent, changing for a period after injury or surgery, then eventually settling into their final form. Once a scar is described as “mature” or “fully healed,” many people assume that no further improvement is possible. Clinically, however, scar tissue can remain biologically and mechanically active long after the initial injury has healed.

It is not uncommon for patients to seek assessment years — and sometimes decades — after a scar first formed. This may be because symptoms such as tightness, discomfort, itch, or changes in appearance persist over time, or because the impact of the scar becomes more noticeable later.

Scars are not biologically inert structures. Even after apparent maturation, scar tissue remains responsive to mechanical forces, vascular influences, and cellular signalling within the dermis.

In some cases, scars continue to evolve over time. This is most evident in keloid disease, where progressive growth can occur well beyond the initial injury. Beyond this, more gradual changes can also occur — alterations in surrounding skin quality with ageing, changes in collagen organisation, or fluctuations in body weight can modify how a scar appears and behaves. A previously inconspicuous scar may become more visible, more tethered, or functionally restrictive over time.

The degree to which an established scar may respond to treatment varies, and not all scars require intervention. However, the idea that scars become untreatable after a certain point in time is not supported by current understanding of scar biology.

If you’ve been told that nothing further can be done, or have simply assumed that too much time has passed, that may not be the case.

Scars typically progress through several phases of wound healing: haemostasis, inflammation, proliferation, and remodelling. The remodelling phase can extend over 12–18 months or longer.

A scar is generally considered mature when:

• It has stabilised in colour (often fading from red to pale)
• Changes in thickness have slowed or plateaued
• The tissue feels relatively settled.

However, even a mature scar is still structurally and biologically different from normal skin.

Even years after healing, scar tissue can continue to differ from unaffected skin in several key ways:

• Collagen structure remains disorganised
• Vascular patterns may be altered
• Elasticity and compliance are often reduced
• Neural signalling can remain heightened or dysregulated

These differences explain why a scar may still feel tight, look different, or cause symptoms long after it has “healed.”

Yes. Although mature scars are generally less active than scars in earlier phases of healing, they do not become completely biologically inactive.

Research into scar remodelling demonstrates that even established scar tissue can undergo:

• Collagen reorganisation and realignment
• Changes in dermal thickness and density
• Modulation of vascularity
• Alterations in inflammatory signalling pathways

This biological responsiveness is what makes treatment possible, even years later. This means that even years after an injury, scars may still respond to targeted intervention. It also explains why some mature scars can intermittently become more “active.”

You may notice episodes of redness, increased firmness, or heightened sensitivity in your scar. This reflects ongoing inflammatory signalling within the scar, particularly in hypertrophic or keloid-prone biology.

Not all scars require treatment. Many settle into a state that causes no symptoms and does not affect daily life.

However, certain scars remain clinically relevant due to ongoing structural or biological factors:

Persistent Fibrosis

Excess collagen deposition can result in a scar that remains thick, firm, contracted or raised. This is commonly seen in hypertrophic scarring and in keloids, where collagen production remains dysregulated beyond normal wound healing.

Mechanical Tension and Location

Scars across areas of high tension, such as joints, shoulders, or the chest, may remain tight or functionally restrictive. These forces can perpetuate abnormal scar behavior even years after injury.

Altered Vascularity

Some scars retain increased vascularity, a higher-than-normal blood supply, contributing to redness and ongoing metabolic activity within the tissue, and symptoms such as heat sensitivity, itch, or discomfort. In contrast, other scars may demonstrate reduced vascularity, reflecting altered or impaired microcirculation. This can contribute to scar instability, delayed recovery following injury, dryness, temperature sensitivity, and changes in overall tissue quality.

Neural Sensitivity

Symptoms such as itch, pain, or hypersensitivity can persist due to altered nerve function within the scar tissue. Itch, in particular, is a common feature of ongoing scar activity and may reflect

low-grade inflammation, altered neural signalling, or continued biological activity within the scar.

Adherence to Underlying Structures

In deeper injuries or grafted areas, scars may adhere to underlying anatomical structures such as fascia, bone, or other structures, limiting movement and contributing to discomfort.

These factors highlight why time alone does not always resolve scar-related concerns.

In many cases, yes. Treatment is not about “removing” a scar, but rather about modifying the scar tissue to improve function, symptoms, and overall scar quality. Complete scar removal is not possible, as the original architecture of normal skin cannot be fully restored once scar tissue has formed.

The degree of improvement that may be achieved depends on several factors, including:

• The type of scar (for example hypertrophic, atrophic, keloid, grafted, or surgical scars)
• How long the scar has been present and any previous treatments
• The anatomical location of the scar
• Skin type and individual healing tendencies
• Treatment approach used and consistency of treatment over time

Importantly, scars can often be treated even many years after they first formed. While early intervention may help influence how a scar develops, mature scars can also respond to appropriately selected and staged treatment aimed at improving symptoms, function, texture and overall scar quality.

Treatment of mature scars often requires more than a single intervention. Different scars — and even different regions within the same scar — may involve varying degrees of fibrosis, vascular change, tethering, textural irregularity, pigmentation change, or ongoing symptoms. For this reason, management is frequently tailored using a combination of approaches selected according to the scar’s behaviour, structure, and functional impact.

Laser and Energy-Based Therapies

Laser treatments, such as CO2 laser, are an important component of modern scar management. Different laser technologies target different characteristics within scar tissue:

For example:

• Vascular lasers may help reduce persistent redness by targeting abnormal blood vessels
• Fractional ablative lasers create controlled micro-injury within the scar, stimulating collagen remodelling and improving texture, thickness, and pliability.

These treatments aim to stimulate a controlled healing response within the scar tissue, encouraging remodelling of abdnormal collagen and supporting improved tissue organization over time.

In mature scars, this may contribute to:

• Improved softness and flexibility
• Reduction in scar thickness
• Improved texture and integration within surrounding skin

Laser-Assisted Medicine Delivery (LADD)

Ablative fractional laser treatment can create microchannels within the skin, allowing for enhanced penetration of topical medications into scar tissue.

This approach may be considered in selected scars, including:

• Thickened or fibrotic scars
• Keloid-prone scars
• Dyspigmented scars (hypo- or hyperpigmented scars)
• Scars that have not responded adequately to other treatments

Medical and Injectable Therapies

Targeted medical therapies may also play a role in selected cases, particularly in scars that remain biologically active. Depending on the scar characteristics, these may include:

• Intralesional corticosteroids
• Other injectable or topical agents

These approaches may be considered for scars with persistent thickening, redness, itch, discomfort, or ongoing inflammatory activity.

Mechanical and Supportive Therapies

Conservative measures and supportive therapies may still have a role, even in longstanding scars. Depending on the scar presentation, this may include:

• Silicone gel, tape or sheeting (if redness and/or symptoms persist)
• Tension offloading strategies such as taping
• Manual therapy and soft tissue mobilisation
• Lymphatic support technique

These approaches can assist with both structural and symptomatic aspects of scar management.

Surgical Revision

In selected cases, surgical revision may be considered, particularly when there is:

• Significant functional restriction
• Scar contracture or tissue distortion
• Inadequate improvement with less invasive treatment approaches

Surgery does not remove the underlying tendency to scar but may improve contour, movement, and function, particularly when combined with appropriate adjunctive therapies.

Although mature scars are generally more stable than newly formed scars, they can still become inflamed and, less commonly, infected.

Inflammation within a scar may present as:

• Redness or colour change
• Increased firmness or thickening
• Itch, sensitivity, or discomfort

This can occur in response to factors such as mechanical tension, friction, irritation, or minor trauma. In some scars, these changes may reflect ongoing low-grade inflammatory activity within the tissue.

Infection is less common in mature scars but may occur if the skin barrier becomes disrupted. Signs of infection/inflammation can include increasing redness extending beyond the scar, warmth, swelling, tenderness, or discharge. If these features develop, medical assessment is recommended.

It is important to approach scar treatment with realistic expectations. The aim of treatment is not to erase a scar, but to improve scar quality, function, symptoms, and overall tissue behaviour.

Depending on the scar type and treatment approach, potential improvements may include:

• Softer and more pliable tissue
• Reduced thickness or prominence
• Improvement in redness or vascularity
• Improved movement where tethering or contracture is present
• Reduction in symptoms such as itch, discomfort, pain, or sensitivity

The degree of improvement varies between individuals and depends on factors such as scar type, anatomical location, skin characteristics, and the underlying biological activity within the
scar.

Treatment of mature scars is typically progressive rather than immediate. A course of therapy may involve:

• Multiple sessions spaced over weeks to months
• Periods of observation to assess response
• Adjustment of the treatment plan based on outcomes

Improvement is cumulative and may continue even after active treatment has ceased.

No. Many scars are stable, asymptomatic, and do not require intervention. Treatment is generally considered when a scar:

• Causes functional limitation
• Is symptomatic (e.g. itch, pain, sensitivity)
• Remains raised, firm, or visibly active
• Is of concern to the patient

Scar management is not a one-size-fits-all process. An appropriate treatment plan requires consideration of:

• Scar morphology and behaviour
• Patient-specific factors
• Risk profile
• Functional impact
• Patient goals

This is best undertaken in a setting with experience in multimodal scar management.

If you would like to understand whether your scar is suitable for treatment, a consultation at Scarless The Clinic can provide a thorough assessment and an honest picture of what may be achievable for your specific scar.

Early intervention can influence scar formation and, in some cases, reduce the extent of long-term changes. However:

• Late presentation does not preclude treatment
• Mature scars can still respond to intervention
• Treatment strategies are adapted to the stage and behaviour of the scar.

The concept of a “missed window” for treatment is often overstated.

Scars evolve over time, but they do not become biologically inert once they mature. Older scars can often be improved through carefully selected, evidence-based interventions. While they cannot be completely removed, their structure, function, and appearance can often be meaningfully enhanced.

The goal is not erasure, but optimisation: improving how the scar looks, feels, and behaves.