People self-harm primarily to cope with intense emotional pain they feel unable to manage any other way. It is not typically about seeking attention or wanting to die. By a wide margin, the most common reason is to get temporary relief from overwhelming negative emotions, replacing psychological pain with a physical sensation that feels more controllable. Roughly one in five adolescents reports engaging in self-harm, and the behavior cuts across genders, income levels, and backgrounds.
Emotional Relief Is the Primary Driver
The single most common reason people self-harm is to manage emotions that feel unbearable in the moment. Intense negative feelings build before an episode, and the act of self-injury produces a rapid shift toward calm and relief. That relief is temporary, which is part of why the behavior tends to repeat.
This runs counter to a widespread assumption that self-harm is mainly about getting a reaction from other people. Research consistently shows the opposite: most self-harm happens in private, and the person often goes to significant lengths to hide it. While a small number of people do self-injure partly to communicate distress or influence others, this is relevant only to a minority. The core function, across studies using different methods and populations, is emotional regulation.
Self-Punishment and Self-Criticism
Slightly more than half of people who self-harm report doing it as a form of self-directed anger or self-punishment. They may feel intense shame, self-hatred, or a belief that they deserve to be hurt. Research suggests that high levels of self-criticism have a causal relationship with self-injury, meaning the harsh internal voice isn’t just a side effect but an active driver of the behavior. For many people, both functions overlap: the same episode serves to release emotional pressure and to act on feelings of worthlessness.
What Happens in the Body
There is a biological component that helps explain why self-harm provides relief and why it can become a pattern. When tissue is damaged, the body releases beta-endorphin, a natural painkiller that belongs to the same chemical family as opioids. This release doesn’t just dull the physical pain at the injury site. It can create a brief sense of calm or even mild euphoria, temporarily overriding the emotional distress that triggered the behavior in the first place.
One theory, known as the homeostasis model, proposes that some people who self-harm are essentially using physical pain to trigger this endorphin response as a way to restore emotional balance. Over time, the brain can come to rely on this cycle, making it harder to stop without learning alternative ways to regulate intense feelings.
It Is Not the Same as a Suicide Attempt
Self-harm and suicidal behavior are distinct, even though they can coexist in the same person. The intent behind self-harm is almost always to feel better, while the intent behind a suicide attempt is to stop feeling altogether. People who self-harm typically use methods that damage the surface of the body without risking life, and they rarely use the same methods they would consider for a suicide attempt. The aftermath is also different: a typical episode of self-harm leads to short-term improvement in mood and functioning, while a suicide attempt produces the opposite.
Self-harm also tends to be more frequent, used regularly or intermittently to manage stress, while suicidal behavior is far rarer. The level of psychological distress behind self-harm, though real and serious, is generally lower than the kind of despair that drives suicidal thoughts. That said, a history of self-harm does increase the risk of suicidal behavior over time, which is one reason it should be taken seriously even when there is no suicidal intent.
Who Is Most Affected
Self-harm is most common among adolescents and young adults. In large studies of teenagers, about 18 to 22 percent report engaging in self-harm behaviors, with prevalence rising from 18% in 2018 to around 20 to 22% in more recent years. Girls account for roughly two-thirds of adolescent self-harm cases, though boys make up a significant portion as well. Younger adolescents (around 8th grade) tend to report the highest rates, though the behavior occurs across all age groups.
Several factors increase the likelihood of self-harm. Depression and other mental health conditions are strongly associated, as are substance use, chronic pain, and a history of adverse childhood experiences like abuse or neglect. Impulsive tendencies, feelings of hopelessness, and a pattern of intense self-criticism also raise risk. On the relationship side, bullying, social isolation, high-conflict family dynamics, and loss of important relationships all play a role. Lower family income is associated with higher rates as well, with adolescents from lower-income families making up about 56 to 62% of self-harm cases across multiple years of data.
Signs Someone May Be Self-Harming
Because self-harm is usually done in private, the signs tend to be indirect. Wearing long sleeves or pants even in hot weather is one of the most recognized indicators. Other physical signs include unexplained cuts, scratches, burns, bruises, or bite marks, often in patterns and typically on the arms, legs, chest, or abdomen. Frequent explanations about “accidental” injuries can also be a signal.
Behavioral changes matter too. Rapid emotional shifts, increasing social withdrawal, expressions of hopelessness or worthlessness, and keeping sharp objects on hand without a clear reason are all potential warning signs. The behavior often follows a controlled, repetitive pattern rather than appearing chaotic or random.
What Helps People Stop
Because self-harm functions as a coping mechanism, recovery isn’t just about stopping the behavior. It requires building alternative ways to handle the intense emotions that drive it. The most well-studied approach is dialectical behavior therapy (DBT), which teaches specific skills in four areas: managing emotions, tolerating distress, improving relationships, and staying present through mindfulness.
In practice, this often looks like learning to recognize when distress is escalating and applying a different response before it peaks. For adolescents, one effective component involves calming breathing exercises practiced together with a parent or caregiver, which improves both the teen’s ability to manage distress and the family’s ability to communicate during difficult moments. Between therapy sessions, people learn to use distraction or self-soothing techniques in the moment instead of turning to self-injury. Having access to a therapist for real-time coaching during a crisis, rather than only during scheduled appointments, has also proven helpful.
Recovery from self-harm is rarely instant. The behavior often serves a function that took years to develop, and replacing it with healthier strategies takes time and practice. But the evidence shows that with the right support, people do stop, and the emotional skills they build in the process tend to improve their overall quality of life well beyond just ending the self-injury.