3 Essential Things To Understand About Self-Harm

Self-harm can look confusing from the outside—but it’s often a nervous system strategy for surviving overwhelming internal pain.

Self-harm refers to deliberate actions that cause physical injury—such as cutting, scratching, burning, or hitting oneself. Clinicians sometimes use the term non-suicidal self-injury (NSSI) because self-harm is often not about wanting to die. More often, it’s a way to cope with overwhelming emotional pain.

Self-harm can be confusing—both for those experiencing it and for their loved ones. It can also evoke feelings of fear, shame, and secrecy, which make it even harder to discuss.

Self-harm is fairly common. Estimates show about 4–6% of adults report a history of self-harm, and some research indicates nearly 1 in 5 adolescents engage in self-harm at some point.

Here are three essential things to understand:

1) Self-harm is rarely about “attention”—it’s usually about distress

There isn’t one simple cause of self-harm. But research consistently shows that self-harm is more common among people with:

• anxiety and depression

• trauma histories (including childhood trauma)

• chronic stress

• disrupted attachment and relational insecurity

• difficulty regulating emotions

For many people, self-harm becomes a coping mechanism when internal pain feels overwhelming, confusing, or unending.

From a nervous system perspective, self-harm often shows up when someone feels flooded, overwhelmed, or trapped inside an internal experience they can’t escape.

2) Self-harm usually has a purpose (even if it causes harm)

This is one of the most important things to understand: self-harm often provides immediate relief. Not in a healthy way—but in a way that quickly changes how someone feels inside.

Self-harm can serve several purposes:

It helps regulate overwhelming emotion

Many people describe self-harm as a way of coping with intense emotional states—especially when they don’t have other tools yet.

Common triggers include:

• shame

• anger

• loneliness

• panic

• abandonment

• emotional numbness

• feeling “too much” or “not enough”

This is also where interoception matters. When someone can’t identify what they’re feeling, their body might still be expressing the message through sensations—tightness, agitation, heat, pressure, buzzing, or emptiness.

Self-harm can become an attempt to interrupt or contain that internal storm.

It can reduce hyperarousal (fight-or-flight)

Some people self-harm when their nervous system is in a state of intense activation: racing thoughts, emotional reactivity, intrusive memories, agitation, or panic.

In these moments, self-harm can briefly bring the nervous system down from an unbearable level of intensity.

It can provide an “external reason” for internal pain

A lot of trauma wounds are invisible. The pain of fear, grief, shame, or abandonment doesn’t show up on the outside.

Self-harm can become a way of making internal suffering visible—or making it feel more concrete and explainable.

It can be a form of self-punishment

Many people who self-harm carry a heavy burden of self-blame and shame.

If someone learned early in life that they were “bad,” “too much,” “not enough,” or responsible for what happened to them, self-harm can become an expression of that internalized belief.

It can be a way to feel something when numbness takes over

For some people, self-harm isn’t driven by emotional overwhelm—it’s driven by emotional shutdown.

When someone feels disconnected, hollow, foggy, or unreal, physical pain can temporarily give a person a sense of being alive, present, or real again.

3) Self-harm and substance use often overlap

It’s important to talk about the connections between self-harm and substance use.

Self-harm usually peaks during adolescence and declines for many people over time. That’s often seen as “they grew out of it.” Sometimes they actually did—because they developed better coping strategies, support systems, and emotional regulation skills.

But sometimes something else happens:

Self-harm decreases, and substance use increases.

Research has shown that adolescents who self-harm are at higher risk of later heavy or dependent substance use in adulthood. In other words, the underlying distress may persist, but the coping strategy shifts.

This fits what many clinicians observe: when pain, shame, and dysregulation aren’t addressed, the nervous system keeps reaching for relief wherever it can find it.

In Summary

Self-harm is rarely driven by a desire to die. More often, it is a way to cope with overwhelming, unmanageable, or invisible emotional pain.

The most compassionate and effective response isn’t judgment or shame—it’s understanding, safety, and support that helps someone to develop healthier ways to manage distress. If you or someone you care about is struggling with self-harm, it might indicate that deeper pain needs attention—rather than punishment.

Trauma-informed therapy, supportive relationships, and nervous-system-based tools can truly make a difference.

If you are in immediate danger or feel unable to ensure your safety, please contact local emergency services or a crisis line in your area right away.

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