In mental health contexts, SH stands for self-harm. It refers to the act of intentionally hurting your own body, and it is one of the most widely used abbreviations in mental health discussions online, in clinical settings, and in support communities. About one in five adolescents reports engaging in self-harm, and the behavior occurs across all age groups, though it peaks during the teenage and young adult years.
What Self-Harm Actually Means
Self-harm is when a person deliberately injures their own body. The most commonly referenced form is cutting, but self-harm also includes burning, hitting, scratching, or any other intentional physical injury directed at oneself. You may also see the abbreviation NSSI, which stands for non-suicidal self-injury. This term draws a specific distinction: the person’s goal is not to end their life. That distinction matters because self-harm and suicidal behavior, while sometimes overlapping, have different underlying patterns and require different kinds of support.
The abbreviation “SH” appears frequently in online forums, text conversations, and social media because it lets people discuss a sensitive topic without triggering content filters or feeling exposed. In clinical notes, providers use it as shorthand the same way they might write “MH” for mental health or “SI” for suicidal ideation.
Why People Self-Harm
The single most common reason people self-harm is to get temporary relief from overwhelming negative emotions. Intense distress builds to a point that feels unbearable, and the physical act of self-injury produces a brief sense of calm or release. Research consistently shows that intense negative emotions come right before an episode, and that those emotions drop sharply afterward. This is what makes the behavior so difficult to stop on your own: it works in the short term, even though it causes harm over time.
Roughly half of people who self-harm also describe it as a form of self-punishment or self-directed anger. They may feel they deserve pain, or they use it to express frustration with themselves. Studies suggest that high levels of self-criticism play a causal role in sustaining this pattern.
Less commonly, self-harm serves other purposes: creating a visible, physical sign of inner pain that feels otherwise invisible, feeling something when emotional numbness takes over, or regaining a sense of control during chaotic circumstances. Most people who self-harm report more than one of these motivations at once, and the reasons can shift over time.
Who Is Most at Risk
Self-harm rates are highest among people already experiencing significant emotional distress. Depression and bipolar disorder carry the strongest association, but anxiety disorders, eating disorders, substance use disorders, and schizophrenia all increase risk substantially. In one large English study using national health records, every psychiatric condition examined raised the risk of self-harm by at least fivefold compared to the general population.
Among adolescents specifically, prevalence rose from 18% in 2018 to nearly 22% in 2022, likely driven in part by pandemic-related stress. By 2024, the rate had dipped slightly to about 20%, suggesting some recovery but still above pre-pandemic levels. These numbers reflect self-reported behavior, so actual rates may be higher given the secrecy that often surrounds self-harm.
Traits that show up repeatedly in research include difficulty managing emotions, a tendency toward intense negative feelings, and high self-criticism. Experiencing trauma, bullying, or significant interpersonal conflict also raises vulnerability. Self-harm is not limited to any single demographic, but the combination of emotional intensity and limited coping tools is a near-universal thread.
Signs Someone May Be Self-Harming
Self-harm is typically a private behavior, and people who engage in it often go to considerable lengths to hide it. Wearing long sleeves or pants even in warm weather is one of the more recognizable signs. Unexplained cuts, burns, bruises, or scars, particularly in patterns or on areas like the forearms, thighs, or stomach, can also be indicators.
Behavioral changes are sometimes easier to notice than physical ones. Increased withdrawal from friends or activities, expressions of hopelessness or worthlessness, keeping sharp objects nearby without a clear reason, and becoming unusually secretive about their body or personal space can all point to self-harm. None of these signs is definitive on its own, but a cluster of them, especially alongside known emotional difficulties, warrants a gentle conversation.
How Self-Harm Is Treated
The most effective treatment for self-harm is a type of therapy called Dialectical Behavior Therapy, or DBT. It is the only approach classified as “well-established” for reducing self-harm in young people, based on multiple rigorous clinical trials. In a trial of 173 adolescents, DBT significantly reduced both self-harm and suicide attempts compared to supportive therapy alone.
DBT works by targeting the emotional regulation difficulties at the root of self-harm. It teaches specific skills for tolerating distress, managing intense emotions, improving relationships, and practicing mindfulness. For adolescents, the full program involves both individual sessions and group skills training that includes caregivers, so families learn alongside their teen. Between sessions, a phone coaching component helps people use these skills during real moments of crisis rather than only discussing them in a therapist’s office.
Cognitive behavioral therapy (CBT) is another common approach, particularly versions adapted for self-harm and suicide prevention. CBT focuses on identifying the specific stressors and thought patterns that trigger self-injurious behavior and building alternative coping strategies. Evidence for CBT’s effectiveness with self-harm specifically is more mixed than for DBT. Studies show it can reduce suicide attempts, but its impact on non-suicidal self-injury alone has been less consistent. Combining individual CBT with family-based therapy appears to produce the best results.
Recovery from self-harm is rarely linear. Setbacks are common, especially early on, and the process involves gradually replacing a coping mechanism that provided real, if harmful, relief with healthier alternatives that take longer to master.
Getting Support
If you or someone you know is struggling with self-harm, the 988 Suicide and Crisis Lifeline is available 24 hours a day, 7 days a week. You can call or text 988, or chat online at 988lifeline.org. Self-harm is specifically listed among the concerns the lifeline supports. Services are available in English and Spanish, with interpretation available in over 240 additional languages for callers. The Crisis Text Line is another option: text HOME to 741741 to connect with a trained counselor by text message.