An SH scar is a scar left by self-harm, most often from deliberate cutting but sometimes from burning, scratching, or other forms of self-injury. The abbreviation “SH” is widely used online and in clinical settings as shorthand. These scars tend to share a recognizable pattern: multiple thin, parallel lines, usually on the inner forearm, though they can appear elsewhere on the body. Their appearance ranges from faint silvery-white streaks to raised, discolored ridges, depending on the depth of the original wound, how the skin healed, and the person’s skin tone.
Where SH Scars Typically Appear
The most common location is the inner (flexor) surface of the non-dominant forearm, because it is the easiest area for a right-handed or left-handed person to reach with a sharp object held in the dominant hand. The anterior thigh is the second most frequent site.1JAAD Reviews. Clinical review Self-inflicted lesions in dermatology: The scars of self-harm Scars can also appear on the upper arms, hips, stomach, and occasionally the ankles or chest. Burns from self-harm sometimes appear on the hands or face.2PubMed Central. Deliberate self-harm scars: Review of the current literature
The distribution itself is a clue clinicians use. Because scars from cutting are typically confined to the upper limbs and concentrated on the non-dominant forearm, they form a distinctive grouping that experienced healthcare workers and many members of the general public now recognize.3PubMed Central. Self-harm scar revision People living with these scars are often acutely aware of how identifiable the pattern is, which is one reason many try to keep them covered at all times.
What SH Scars Look Like
The classic appearance is a cluster of straight, parallel lines running across the skin. In many cases, the scars are flat rather than raised, which actually makes them harder to treat than the bulky, rope-like scars people associate with major surgery or burns.2PubMed Central. Deliberate self-harm scars: Review of the current literature Their flatness, combined with their number and regularity, is part of what makes them visually distinctive.
Not all SH scars fit this profile, however. Depending on how the skin healed, they can appear in several forms:
- Flat and pale: Shallow cuts often heal into thin, white or silvery lines that sit flush with the surrounding skin. These are sometimes called atrophic scars when the healed tissue sits slightly below the skin surface.
- Raised and firm: Deeper or repeatedly injured areas can produce hypertrophic scars or, less commonly, keloid scars, which are thickened ridges of tissue that extend beyond the original wound.4JAAD Reviews. Clinical review Self-inflicted lesions in dermatology: The scars of self-harm – Section: Skin finding characteristics in NSSIB
- Discolored: Healing scars frequently develop changes in pigmentation. They may become darker than the surrounding skin or lighter, and this color difference is often the feature that makes scars most visible from a distance.4JAAD Reviews. Clinical review Self-inflicted lesions in dermatology: The scars of self-harm – Section: Skin finding characteristics in NSSIB
- Burn-related: SH scars from burns tend to look different from cutting scars. Rather than parallel lines, they appear as irregular patches of smooth, tight, or shiny skin, often with pronounced pigment changes.
Clinicians classify SH scars as a distinct category alongside other scar types like surgical scars and keloids, precisely because their combination of features, multiple, linear, grouped, and often flat, does not map neatly onto other scar categories.5PubMed. The dermatology life quality index as a means to assess life quality in patients with different scar types
How Skin Tone Affects Appearance
On lighter skin, fresh SH scars tend to start red or pink and gradually fade to white or silvery over months to years. The result is often a network of pale lines that stand out against untanned skin but become more visible with a tan, since scar tissue does not pigment the way normal skin does.
On darker skin tones, the picture is more complicated. Healing wounds are more prone to both darkening and lightening of the surrounding area, so scars may appear as noticeably darker or lighter streaks against the person’s natural complexion. Keloid formation is also more common in people with darker skin, which means SH scars in these individuals are more likely to be raised and firm rather than flat. The pigmentation changes can persist long after the texture of the scar has settled, making the marks visually prominent even when they are smooth to the touch.
Why Depth Matters
Superficial cuts that affect only the outermost layer of skin tend to heal with minimal scarring or leave behind faint lines that are barely perceptible in certain lighting. Cuts that reach the deeper layer of skin, the dermis, are the ones that produce visible, lasting scars because the body fills the gap with collagen fibers that are structurally different from normal skin.
When a wound is deep enough to reach or damage superficial nerves and blood vessels, the scar may come with lasting sensory changes: numbness, tingling, or hypersensitivity in or around the scarred area.6JAAD Reviews. Clinical review Self-inflicted lesions in dermatology: The scars of self-harm – Section: Skin finding characteristics in NSSIB These sensory effects are not always discussed in the context of SH scars, but they are a real and sometimes distressing feature, especially for people whose scars cover large areas.
Repeated injury to the same area, which is common with self-harm, compounds the scarring. Each new wound disrupts the healing tissue from the last one, leading to thicker, more irregular scars than a single cut in the same location would produce. This is why some SH scars appear as a dense, textured band across the forearm rather than discrete individual lines.
Do SH Scars Fade Over Time?
All scars remodel over time, and SH scars are no exception. Redness typically diminishes within the first year or two. Raised scars may flatten somewhat. Pigment changes often soften. But the scars do not disappear. How much they fade depends on the depth and number of the original wounds, the person’s skin type, and their age when the injuries occurred. Younger skin heals faster but can also produce more exuberant scar tissue.
For many people, older SH scars become subtle enough that they are only noticeable at close range or in certain light. For others, particularly those with extensive or deep scarring, the marks remain quite visible years or even decades later. The flat, parallel, grouped pattern remains recognizable regardless of fading, because it is the geometry of the scars, not just their color, that people register.
The Emotional Weight of Living with SH Scars
The physical appearance of SH scars is only part of the story. Research consistently finds that these scars carry a heavy psychosocial burden. Across multiple studies, shame and stigma are the dominant themes reported by people living with SH scars, affecting their social interactions, quality of life, and ongoing mental health.7Psychotherapy and Counselling Journal of Australia. Impacts of Self-Harm Scars on Psychosocial Functioning, Quality of Life, and Recovery in People With Histories of Self-Harm: A Scoping Review – Section: Results
Adolescents in therapy for depression have described their SH scars as both shameful and paradoxically meaningful, sometimes viewing them as tangible evidence of their suffering.8PubMed Central. “I can’t escape my scars, even if I do get better”: A qualitative exploration of how adolescents talk about their self-harm and self-harm scars during cognitive behavioural therapy for depression This complicated relationship with the scars can make recovery harder, because even when a person has stopped self-harming, the visible marks keep pulling them back into distress.
There are practical consequences, too. People with forearm scars report avoiding short-sleeved clothing, swimming, and social situations where their arms might be exposed. Certain occupations that require bare forearms, including healthcare, food service, and some manual trades, create daily anxiety for people whose scars are located on the arms.3PubMed Central. Self-harm scar revision The scoping review evidence also links visible SH scars to increased risk of engaging in self-harm again and, in some cases, increased suicide risk, making scar management a legitimate clinical concern rather than a purely cosmetic one.7Psychotherapy and Counselling Journal of Australia. Impacts of Self-Harm Scars on Psychosocial Functioning, Quality of Life, and Recovery in People With Histories of Self-Harm: A Scoping Review – Section: Results
Treatment Options for SH Scars
The research literature on SH scar treatment is still relatively thin. A scoping review that searched for published treatments identified only a handful of studies describing laser therapy, surgical approaches, and vitamin A-based treatments.9Dermatologic Surgery. Treatment of Self-Harm Scars: A Scoping Review That is a strikingly small evidence base for something that affects millions of people. Still, the available options fall into a few main categories.
Topical and Non-Invasive Approaches
Silicone-based products, including sheets and gels, are considered the first-line non-invasive option for scar prevention and treatment more broadly.10PubMed. Management of scars: updated practical guidelines and use of silicones They work best when applied early in the healing process and are more effective on raised scars than on the flat, mature scars that characterize many SH marks. For someone with older, settled scars, silicone products are unlikely to produce dramatic changes, but they can improve texture and reduce itching or tightness.
Steroid injections, a standard treatment for hypertrophic and keloid scars, tend to be less effective for SH scars specifically because the scars are often flat and multiple rather than a single raised ridge. The geometry does not lend itself well to injection-based approaches.2PubMed Central. Deliberate self-harm scars: Review of the current literature
Laser Treatment
Fractional laser therapy has shown the most promising results in the limited research available. A study using a non-ablative fractional laser on SH scars found that scar surface irregularity dropped by roughly a third over six months, with the height of raised scar portions falling by more than 40%. The improvements were visible clinically and correlated with better quality-of-life scores reported by patients. The procedures were well tolerated, with minimal downtime and no lasting side effects.11PubMed. Objective evaluation of the efficacy of a non-ablative fractional 1565 nm laser for the treatment of deliberate self-harm scars The researchers noted that while the scars would never fully resolve, their appearance could be improved to a point that patients found more socially and cosmetically acceptable.
Laser treatment works by creating tiny, controlled zones of damage in the scar tissue, which prompts the body to lay down new collagen in a more organized pattern. Multiple sessions are typically needed. The approach is better suited to improving texture and evening out surface irregularities than to eliminating the scars entirely.
Surgical Revision
Surgical options include excision, where the scarred skin is cut out and the edges stitched together, and dermabrasion, where the surface is mechanically smoothed. These are most practical when the scarring is concentrated in a relatively small area. For people with widespread, parallel scars across a large section of the forearm, surgical revision faces the same challenge as steroid injections: the features that make SH scars distinctive also make them difficult to address surgically.2PubMed Central. Deliberate self-harm scars: Review of the current literature The goal of surgery is usually to convert a recognizable pattern of self-harm scars into a single, less identifiable scar, though results vary considerably.
Tattooing and Camouflage
Cosmetic tattooing and decorative tattooing have become increasingly popular approaches to managing the visibility of SH scars. Cosmetic tattooing uses pigments matched to the person’s skin tone to minimize the contrast between scar tissue and the surrounding skin. Decorative tattooing takes a different path, covering the scarred area with an artistic design that transforms the scars into something the person chose rather than something that was done to them.12JAAD Reviews. Clinical review Self-inflicted lesions in dermatology: The scars of self-harm – Section: Dermatologic treatment
Tattooing over scar tissue requires a skilled artist because scarred skin holds ink differently. The texture may cause lines to blur or pigment to take unevenly. Many tattoo artists now specialize in scar cover-up work and can adapt their technique accordingly. For some people, the process of reclaiming the area with a chosen image is psychologically meaningful, separate from the cosmetic result. That said, reputable tattoo artists typically ask that scars be fully healed, often at least one to two years old, before working on them.
How Clinicians Assess SH Scars
Unlike surgical scars, which have well-established rating scales, SH scars have only recently gotten their own dedicated assessment tools. Researchers have developed scar-specific scales that measure not just the physical characteristics of SH scars but also the person’s thoughts about them and the lengths they go to in order to conceal them.13PubMed Central. Development and Validation of the Korean Version of the Multidimensional Non-Suicidal Self-Injury Scar Scale This multidimensional approach reflects the reality that the “severity” of SH scars is not just about how they look on a medical exam. Two people with physically identical scars can have vastly different levels of distress depending on their relationship to the scars, their current mental health, and how much the scars interfere with their daily life.
In a clinical setting, a provider examining SH scars will typically note the location, number, pattern, whether the scars are raised or flat, and any color changes. They may also ask about sensory symptoms like numbness or sensitivity. But the emerging consensus is that a physical description alone misses the point. Assessment that accounts for how the scars affect the person’s functioning and self-image is becoming standard in mental health and dermatology practices that see these patients regularly.
When SH Scars Are Mistaken for Something Else
People sometimes worry that scars from accidents, surgery, or skin conditions will be mistaken for SH scars. This can happen, particularly when linear scars appear on the forearms. Cat scratches, cooking burns, and even some dermatologic conditions can leave marks in the same general area. However, the hallmarks of SH scarring, especially the parallel, grouped, same-depth pattern on the inner forearm, are fairly specific. A single scar or a few scattered marks from everyday injuries generally do not match the visual signature.
The concern also runs in the other direction. Some people with SH scars have reported that healthcare providers noticed the scars during unrelated appointments and either asked about them in a way that felt intrusive or made assumptions about their current mental state. For someone who self-harmed years ago and has since recovered, having old scars treated as evidence of an ongoing crisis can be frustrating. This is an area where clinical awareness is still catching up with what people who live with these scars actually experience and need.
Cosmetic Makeup and Temporary Coverage
For people who want to reduce the visibility of their scars without permanent treatment, cosmetic camouflage products offer a practical option. These are specialized, highly pigmented concealers and foundations designed to cover scars, birthmarks, and other skin discolorations. They are heavier than everyday makeup and are typically set with a fixative powder to resist rubbing and water.
Medical-grade camouflage products differ from standard concealer in their opacity and staying power. Some dermatology clinics offer camouflage consultations where a trained specialist matches the product to the person’s skin tone and teaches application techniques specific to scar tissue. Coverage can be surprisingly effective on flat, pale scars, though raised or deeply discolored scars are harder to conceal completely. For many people, the option to temporarily cover their scars for a specific event or social situation provides meaningful relief from the anxiety of exposure, even if they do not use the products every day.