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What is self-harm? A clear definition
Self-harm is the deliberate act of causing pain or injury to your own body without suicidal intent. It can take the form of self-injury – such as cutting, burning or hitting – or self-poisoning, including overdosing on medication or swallowing toxic substances.
It’s not typically a one-off incident. Self-harm is often a repeated coping mechanism used to manage overwhelming emotions or, at times, to escape feeling nothing at all.
The NHS defines self-harm as “an act of self-poisoning or self-injury carried out by a person, irrespective of their motivation”. This broad definition recognises that while self-harm and suicidal thoughts can occur together, many people use self-harm to cope with psychological pain rather than to end their lives.
Data published in the 2019 “Suicide and self-harm in Britain” report by NatCen Social Research suggests there has been a steady rise in reports of non-suicidal self-harm among adults in England. In 2000, 2.4% of people aged 16–74 said they had self-harmed. By 2007, this had increased to 3.8%, and by 2014 it had reached 6.4%.
It is important not to dismiss self-harm as attention-seeking. For most, it’s hidden, carried out in private and accompanied by feelings of guilt or shame. It can be part of someone’s way of regulating emotions – harmful though it may be – and is a signal that they need understanding and support, not judgement. In clinical settings, distinguishing self-harm from suicidal behaviour is crucial: while everyone who self-harms requires compassionate care, those with active suicidal intent need immediate intervention and risk management.
Who is affected? Demographics and prevalence
Self-harm affects people across all age groups, genders and backgrounds, but prevalence peaks during adolescence and early adulthood.
NHS data shows that 32.8% of young people aged 17–24 have self-harmed or attempted to self-harm. According to NHS Digital data for England, there were over 228,000 hospital admissions for self-harm in 2022–23, with females accounting for nearly two thirds of patients.
People who identify with an LGB+ orientation (“gay or lesbian”, “bisexual”, or “other sexual orientation”) have been found to have a risk of intentional self-harm 2.5 times higher than those identifying as straight or heterosexual.
Socio-economic factors also play a role, with higher rates often reported in communities facing deprivation. Financial strain, insecure housing and limited access to mental health support all add to the pressure.
Yet self-harm is not confined to any one background. People from middle- and higher-income families can be just as affected, particularly when faced with academic expectations, career stress or other pressures that impact well-being.
Common forms of self-injury
Self-injury takes many forms, shaped by a person’s history, available means and coping style. Common examples include:
- Cutting or scratching the skin with sharp objects such as razors, blades or glass, often on the arms, thighs or abdomen
- Burning with cigarettes, matches or heated metal, leaving scars or blisters
- Hitting or punching oneself against walls or hard objects to cause bruising or fractures
- Biting or picking at wounds, leading to tissue damage and infection
- Hair-pulling (trichotillomania) leading to noticeable bald patches
- Ingesting toxic substances or overdosing on prescribed or over-the-counter medications, sometimes to the point of requiring medical admission
While cutting is often the most visible, self-poisoning accounts for most hospital admissions. Less recognised behaviours – such as extreme exercise, deliberate starvation or even purposeful bone-breaking – may serve the same emotional regulation function and deserve equal attention during assessment.
Why do people self-harm?
Self-harm is rarely a random, impulsive act. It usually stems from deep psychological drivers. Some of the most common include:
- Releasing overwhelming emotion – feelings like anger, guilt, shame or sadness can feel unbearable, and physical pain offers a controllable outlet.
- Self-punishment – people who feel unworthy may use self-harm as a way to atone for perceived failures or wrongs.
- A form of communication – when words are not enough, self-harm can express inner pain or signal the need for help.
- Breaking through numbness – for those who feel emotionally detached or dissociated, physical pain can restore a sense of reality or simply allow them to “feel something”.
Therapists often note that while these behaviours may bring short-term relief, they ultimately deepen shame and isolation. Understanding the complex mix of reasons behind self-harm is key to responding with empathy and offering support that addresses the underlying pain.
Below, we’ll look at some of the causes of self-harm in more detail.
Emotional regulation and expression of pain
At its core, self-harm often works as a way of regulating emotions. Research shows that self-injury can trigger the release of endorphins and enkephalins – the body’s natural painkillers – which briefly reduce emotional intensity. This relief reinforces the behaviour, teaching the brain that physical pain can be a way to cope with feelings that otherwise feel unmanageable.
For some, physical injury is a symbol. When emotions feel “too big for words”, visible wounds externalise the turmoil inside. Many people describe self-harm as a way to “vent” pressure before it builds to the point of explosion.
Treatment in these cases often focuses on building healthier coping strategies – grounding, distress tolerance skills or creative outlets – to replace self-injury over time.
The role of trauma, abuse and neglect
Many people who self-harm have lived through trauma. Childhood sexual or physical abuse, emotional neglect or disrupted attachments are frequently reported. These early experiences can distort the way emotions are processed and managed, making self-injury more likely when distress becomes overwhelming. For some, self-harm becomes a way to cope with feelings that were never safely acknowledged or supported in childhood.
Ongoing harm – such as domestic violence, bullying or exploitation – can also keep people caught in the cycle. In these cases, assessments need to consider not only past trauma but also current safety. Support should combine therapy with safeguarding measures and, where necessary, legal protection.
Importantly, recognising the role of trauma shifts the focus from blame or judgement to understanding: self-harm is not about attention, but about survival in the face of experiences that may have felt unbearable or unsafe to express in other ways.
Self-harm and mental health conditions
Self-harm rarely occurs on its own. It often sits alongside other clinical conditions that make it harder to regulate emotions.
- Depression and anxiety disorders – persistent low mood and constant worry can fuel hopelessness or panic, with self-injury used as a way to cope.
- Borderline personality disorder – recurrent self-harm is one of the diagnostic features. Intense emotions and identity struggles make self-injury a common pattern.
- Eating disorders – restrictive eating, bingeing, purging and self-injury often overlap. Each can reflect attempts to manage distress, gain control or punish.
- Post-traumatic stress disorder – intrusive memories, hyperarousal and dissociation can lead to self-injury as a way to manage overwhelming symptoms.
Effective treatment works best when both the mental health condition and the self-harm behaviour are addressed together in an integrated plan.
Social factors: Bullying, isolation and peer pressure
Social environments strongly influence self-harm. Bullying – whether online or face to face – can deepen feelings of worthlessness and despair. For some young people, repeated victimisation leads directly to self-injury.
Isolation also removes types of protection that might prevent self-harm. When people become cut off from friends, peers or supportive communities, they lose important buffers against stress. Without chances to talk, share or simply spend time with others, healthy distractions fade. That isolation can make it much harder to cope and leave someone more vulnerable to turning to harmful behaviours.
Peer dynamics can further shape behaviour. In some groups, self-harm becomes normalised or even encouraged, leading to clusters within schools or friendship circles. Online spaces may add risk by sharing methods or promoting “challenges” that glamorise injury.
Educators, parents and carers need to be alert to shifts in friendships or online activity. Guidance on healthy coping, safe digital use and emotional support can reduce the risk of self-harm spreading in these environments.
Misconceptions and stigma around self-harm
Stigma around self-harm still lingers. People who self-injure are too often dismissed as “attention seekers” or judged as weak. In reality, most hide their injuries because of shame, which makes it harder for people to be open and get the help they need.
Training for frontline professionals – GPs, teachers and social workers – stresses the need for empathy and non-judgemental listening. Public campaigns led by mental health charities are also shifting perceptions, showing that self-harm is a serious sign of distress that requires respect and evidence-based care – not criticism.
Understanding the difference between self-harm and suicide
Although self-harm and suicidal behaviour can overlap, they are not the same.
Self-harm refers to non-suicidal self-injury or self-poisoning, while suicide attempts involve intent to end life. Clinical guidance treats these behaviours differently because they require separate assessments and interventions.
That said, self-harm does raise the risk of later suicide attempts. Feelings of hopelessness are common, and some people underestimate the lethality of the methods they use. This is why every presentation of self-harm must be taken seriously, with a full suicide risk assessment that looks at intent, planning and access to means, alongside care for the emotional pain driving the behaviour.
Recognising warning signs and behaviours
Spotting signs of self-harm early can stop problems from escalating and help people access support sooner. Warning signs may include:
- Physical indicators – unexplained cuts, bruises or burns, often hidden by long sleeves, gloves or makeup; frequent “accidents” needing medical attention
- Behavioural changes – withdrawal from social activities, avoiding sports or showers, sudden preoccupation with sharp objects or medicines
- Emotional signals – mood swings, irritability, self-critical comments or remarks such as “I deserve to hurt”
Practitioners, friends and family should meet these signs with care and sensitivity. Asking direct but gentle questions about self-harm is not harmful. It shows concern and a willingness to listen.
How to talk to someone who self-harms
Initiating a conversation about self-harm can be intimidating, as you may fear making the situation worse. It takes empathy, patience and clarity. Here are some tips:
- Choose a private, calm setting – avoid public spaces or rushed environments.
- Use open-ended, non-judgemental language – for example, “I’ve noticed you seem in a lot of pain. Would you like to tell me more?”
- Listen actively – acknowledge feelings (“That sounds incredibly hard”) rather than jumping in with solutions.
- Avoid shock or moralising – visible horror or judgement can reinforce shame and push the person further into secrecy.
- Offer practical support – suggest seeing a GP, school counsellor or local mental health charity, and help with appointments if needed.
Showing genuine concern and making yourself available builds trust and reduces the person’s sense of isolation.
Therapeutic approaches and treatment options
Evidence-based interventions in the UK bring together therapy, medication and community support.
- Dialectical behaviour therapy (DBT) – developed for people with emotion regulation difficulties. It teaches distress tolerance, mindfulness, interpersonal skills and ways to manage intense emotions. DBT is well supported by research for reducing self-harm in borderline personality disorder and other high-risk groups.
- Cognitive behavioural therapy (CBT) – adapted to focus on self-harm, it helps people spot and challenge unhelpful thoughts that fuel self-injury, while building healthier coping strategies.
- Mentalisation-based therapy (MBT) – improves a person’s ability to understand their own (and other people’s) thoughts and feelings. This can help reduce relationship-driven triggers for self-harm.
- Psychiatric medication – antidepressants or anti-anxiety medicines may be prescribed if depression or anxiety amplify urges to self-harm. Medication is usually combined with psychological treatment.
- Group therapy – skills-focused groups (such as DBT skills training) and peer-led groups run by charities like Mind provide shared learning and help people feel less alone.
- Digital interventions – NHS-commissioned programmes and apps offer guided exercises, self-help modules and mood tracking as an extra layer of support.
Access to these treatments is usually through GP referral to Improving Access to Psychological Therapies (IAPT), Child and Adolescent Mental Health Services (CAMHS) for younger people, or specialist NHS teams. Private therapists also offer many of these approaches for those seeking quicker access.
Support for families and friends
Loved ones play a pivotal role in recovery. If you are a family member or friend, you can help by:
- Educating yourself – reliable information from sources such as Mind or the NHS reduces fear and stigma. It also prepares you to speak to someone who is self-harming in the best way.
- Maintaining open communication – regular check-ins show care, but avoid ultimatums or threats, which may increase distress.
- Setting boundaries compassionately – protect your own well-being with limits on conversations and time while remaining supportive.
- Encouraging professional help – offer to attend appointments or help with referrals.
- Seeking your own support – counselling, peer groups or advice lines can help you process emotions and build coping strategies.
Balancing empathy with self-care creates a stable environment that supports recovery without creating dependency.
School and workplace responsibilities
Educational institutions and employers have legal and moral duties to safeguard people who self-harm. This includes:
- Policy development – clear self-harm policies should set out risk assessment, confidentiality boundaries and referral routes to counselling or occupational health.
- Training for staff – teachers, tutors and managers need skills to recognise warning signs, hold sensitive conversations and make appropriate referrals.
- Reasonable adjustments – flexible deadlines, temporary schedule changes or access to a safe space can help people stay engaged while managing distress.
- Peer education – mental health workshops reduce stigma and equip students or colleagues to support one another safely.
- Collaboration with external services – links with CAMHS, IAPT or youth justice teams help streamline access to specialist support.
A proactive, trauma-informed environment does more than reduce immediate risk – it helps create spaces where people feel seen, supported and able to participate fully in school or work life. When policies, training and support systems work together, individuals recovering from self-harm are less likely to feel isolated or stigmatised. Instead, they experience inclusion, safety and the reassurance that their well-being is taken seriously, which makes long-term recovery far more sustainable.
Legal considerations and safeguarding
In the UK, self-harm intersects with safeguarding legislation, particularly where under-18s are involved. Safeguarding frameworks also apply to adults when risk or capacity issues arise. Responders must balance legal duties with respect for individual rights.
- Duty of care – professionals are obliged to act if someone is at risk of significant harm, including self-harm. Timely referral to child protection services or adult safeguarding teams is a legal requirement.
- Confidentiality vs. safety – while privacy is important, disclosure of self-harm is justified if safety is compromised. Consent should be sought wherever possible, but safeguarding overrides the need for consent if there’s an imminent risk.
- Mental Capacity Act 2005 – for adults who lack capacity to make decisions about their care, treatment choices must follow best-interest principles. This may involve a legal proxy or, in some cases, the Court of Protection.
- Consent in under-16s – Gillick competence assessments determine whether a young person can consent to treatment without parental involvement. Safeguarding concerns may still require multidisciplinary input when risk is high.
Crisis support and emergency response
When self-harm escalates to life-threatening behaviour or severe suicidal intent, immediate crisis support is vital. After a crisis, care usually continues through community mental health teams or crisis resolution and home treatment teams. Quick access to these services can be life-saving, helping people move back towards safety and recovery.
- Emergency services – dial 999 if there is risk of serious injury, loss of consciousness or life-threatening overdose.
- Samaritans – Samaritans volunteers are available 24/7 on 116 123, offering a non-judgemental listening ear for anyone in distress.
- SHOUT – a free, confidential text service (text SHOUT to 85258) providing immediate support via trained volunteers.
- Papyrus UK – HOPELINE 247 is a specialist advice service offering support for young people aged under 35 at risk of suicide, as well as for those who are worried about them. (Available on 0800 068 4141 or text 07860 039967.)
- NHS 111. A non-emergency helpline that can advise on urgent mental health support and direct callers to local crisis teams.
