Understanding Self-Harm

What Self-Harm Actually Is

Self-harm — clinically referred to as non-suicidal self-injury (NSSI) — is the deliberate damage to one's own body tissue without suicidal intent. Cutting is the most commonly recognized form, but it also includes burning, hitting, scratching, hair-pulling, and other behaviors. What all of these have in common is not method or severity — it is function. Self-harm is something a person does to their body in order to change how they feel.

That last sentence is the most important thing in this article. Self-harm is affect regulation. It is a strategy, learned over time, for managing internal states that feel otherwise unmanageable. It is not evidence of insanity. It is not a character flaw. It is not manipulation. It is not something people “do for attention.” It is a coping mechanism — imperfect, costly, often isolating — but a coping mechanism nonetheless.

Understanding this does not mean accepting that it should continue forever, or that it doesn't deserve attention. It means approaching it with accuracy instead of judgment — which is the only position from which anything useful can happen.

Barent Walsh's Framework: What Self-Harm Does

Barent Walsh, one of the leading researchers in non-suicidal self-injury, identified five primary functions that self-harm serves. Most people who self-harm are doing so for one or more of these reasons — and the function shapes what recovery needs to look like.

• Affect regulation. The most common function. Intense emotional pain — shame, rage, grief, anxiety — is interrupted or discharged through physical sensation. The nervous system is briefly reset. This is not metaphorical; it is neurobiological, and it works reliably, which is why it persists.
• Anti-dissociation. For people who dissociate — who go numb, who disconnect from their bodies and experience, who feel unreal — self-harm can function as a way back to feeling present. Pain confirms existence. This form of self-harm is particularly common in trauma survivors with significant dissociative symptoms.
• Self-punishment. Rooted in shame, often in internalized messages from abusive or critical environments. The person enacts against themselves what they believe they deserve. This dimension of self-harm is closely linked to complex trauma histories and the presence of a harsh internal critic.
• Anti-suicide. Walsh identified something counterintuitive but clinically important: for some people, self-harm is what keeps them alive. When suicidal urges are active, hurting the body — at a level that is survivable and controllable — provides enough relief from the drive toward death to keep the person going. This is one reason that “just stopping” the self-harm without addressing what drives it can sometimes increase risk rather than reduce it.
• Boundary definition / care-seeking. Some self-harm communicates what cannot be said: “I am in pain.” In some cases, it is an attempt to establish the boundary of self — to feel where the body ends, to assert existence through physical experience. In others, it is a way of expressing need when direct expression has been dangerous or unheard.

The Biology: Why Physical Pain Relieves Emotional Pain

The neurobiological explanation for why self-harm works as a regulation strategy is not mysterious — and understanding it removes a layer of shame. When the body experiences physical pain, it responds with the release of endorphins and endocannabinoids — the same neurochemical systems activated by intense exercise, laughter, and certain medications. This release produces a brief but genuine reduction in subjective distress.

Simultaneously, the experience of physical pain activates the parasympathetic nervous system — the “rest and digest” branch that counteracts the sympathetic activation of emotional flooding. For a nervous system that has been in a state of overwhelm, this parasympathetic shift is experienced as relief. The heart rate slows. The racing thoughts quiet. The emotional intensity decreases.

This is also why the behavior becomes reinforced over time. Relief is a powerful reinforcer. When something reliably produces relief from pain, the brain learns to reach for it. The more often it works, the more automatic the reach becomes. This is not weakness or moral failure — it is learning, the same mechanism by which all habits form.

Recovery, at the neurobiological level, is the process of building new pathways that do the same regulatory job — and repeating them often enough that they become the automatic response instead. It takes time. It takes practice. But the biology is not working against recovery; it is the mechanism through which recovery happens.

Who Self-Harms — Broader Than You Think

The cultural image of self-harm is narrow: teenage girls, visible cuts on wrists, dramatic disclosure. The research tells a different story. Self-harm occurs across all age groups, all genders, all socioeconomic backgrounds, and all levels of apparent functioning. People who appear highly capable — successful professionals, devoted parents, people who seem “fine” — self-harm in secret and carry it for years.

Men self-harm at rates closer to women than is widely recognized, but use different methods that are less likely to be identified as self-harm — and carry greater shame about disclosure. Older adults self-harm, particularly following major loss or late-onset trauma. People with trauma histories, eating disorders, OCD, borderline personality disorder, and depression are all at higher rates — but self-harm also occurs in people with no other identified mental health condition.

Most people who self-harm never seek treatment and never disclose to anyone. They manage it quietly, hide the evidence, and carry significant shame about the fact that they “can't handle things like normal people.” The secrecy is part of what makes it so isolating — and the isolation is part of what keeps it going.

What Self-Harm Is Not

Because misunderstanding drives so much of the harm that comes from how self-harm is responded to, it's worth being explicit.

• It is not attention-seeking. Most self-harm is deeply secretive. People who self-harm go to great lengths to hide it. Even in the minority of cases where disclosure happens, “attention-seeking” misframes the function — the need being expressed is real, the communication is genuine, and framing it as manipulation dismisses a person who is in pain and trying to be seen.
• It is not suicidal intent. Non-suicidal self-injury is functionally distinct from suicidal behavior. The intent is to manage life, not to end it. This distinction matters for how to respond, how to treat it, and how seriously to take disclosure. Both deserve genuine care — but conflating them leads to responses that are often counterproductive for self-harm specifically.
• It is not a sign of psychosis. Self-harm is overwhelmingly a response to emotional pain, not a feature of psychosis or delusion. People who self-harm are usually fully aware of what they are doing and why — which is itself part of the shame they carry.
• It is not untreatable. People recover from self-harm. DBT (Dialectical Behavior Therapy), developed specifically for the population Linehan was working with — many of whom self-harmed — has the strongest evidence base for reducing and eliminating self-harm behavior. Trauma-informed therapy addresses the underlying wound. Recovery is not guaranteed or quick, but it is genuinely possible.

Why People Self-Harm

5 Things to Know If You or Someone You Love Self-Harms

Go deeper

The emotional regulation piece — why flooding happens, what DBT offers, and how to build an alternative toolkit — is explored in depth in Self-Harm and Emotional Regulation →

The connection to trauma — van der Kolk's research, body memory, and why trauma-informed treatment is often necessary — is covered in Self-Harm and Trauma: The Connection Nobody Talks About →

The role of shame in self-harm, and how it heals, connects to broader work on emotional dysregulation and dissociation — both linked throughout this cluster.

Related articles