Suicide Prevention: Causes, Symptoms & Treatment

Suicide is one of the most preventable causes of death. It is not an inevitable outcome of pain or despair; it is a crisis that, with the right intervention, support and care, can be survived. Understanding the warning signs, risk factors and pathways to help is something that concerns all of us.

Overview: What Is Suicide and Suicidal Thinking?

Suicidal thinking exists on a spectrum. At one end, a person may have fleeting thoughts that life is not worth living. At the other, they may have a specific plan and the means to act on it. Everything on this spectrum deserves to be taken seriously, not minimised, dismissed or waited out.

Suicide is death caused by self-inflicted injury with the intent to die. Suicidal ideation refers to thoughts about ending one's life, ranging from passive wishes to die through to active planning. Suicidal behaviour includes any act intended to cause self-harm with the possibility of death. Not everyone who experiences suicidal thoughts will attempt suicide but without intervention, risk can escalate.

Suicidal thinking is not a character flaw, a sign of weakness or a manipulation. It is a signal that a person is in profound distress and that the pain they are carrying has exceeded their current capacity to cope. The goal of suicide prevention is to close that gap by reducing pain, building support and increasing the reasons and resources to stay alive.

When is suicidal thinking a crisis?

Not all suicidal thinking carries the same level of immediate risk, but any expression of suicidal thought should prompt a caring, direct response. The following indicators suggest heightened and urgent risk:

• The person has a specific plan for how they would end their life.
• They have access to the means they have described: medications, a weapon and a location.
• They have set a timeframe or expressed that they intend to act soon.
• They have recently survived a suicide attempt.
• They are withdrawing from everyone and saying goodbye.
• They are showing sudden calmness after a prolonged period of severe distress.

When these signs are present, this is a medical emergency. The person needs immediate professional help, not reassurance, not promises of secrecy and not a waiting approach.

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Symptoms & Causes

What are the Warning Signs of Suicide?

Suicide does not always come with visible warning signs, and some people show no outward indication before an attempt. However, many people do communicate their distress, sometimes directly, sometimes indirectly. Knowing what to look for can be lifesaving.

Emotional and Psychological Signs

• Extreme hopelessness, a fixed belief that things cannot and will not improve.
• Sudden, unexplained calm after a period of severe distress.
• Intense feelings of shame, guilt or self-hatred.
• Feeling completely disconnected from life and the people in it.
• Expressing that they are a burden and the world would be better without them.

What Causes Suicidal Thinking?

Suicidal thinking rarely has a single cause. It typically arises when multiple stressors, biological, psychological and social, converge and overwhelm a person's ability to cope. Understanding these risk factors is essential to identifying who needs support and intervening before a crisis develops.

Mental health conditions
The majority of people who die by suicide have an underlying mental health condition at the time of their death, most commonly depression, bipolar disorder, schizophrenia, substance use disorders or borderline personality disorder. Untreated or inadequately treated mental illness is the single largest risk factor for suicide.

Previous suicide attempts
A prior attempt is one of the strongest predictors of future risk. It indicates that the person has already crossed a significant threshold and requires careful, ongoing follow-up.

Trauma and Adverse Life Experiences
Childhood abuse, neglect, domestic violence, sexual assault and other traumatic experiences significantly elevate long-term suicide risk. Trauma shapes how the brain processes threat, hopelessness and the value of one's own life.

Chronic Pain and Serious Illness
Physical health conditions, particularly those involving persistent pain, disability or terminal diagnosis, increase suicide risk substantially. The relationship between physical suffering and suicidal thinking is direct and often underestimated.

Significant Losses and Life Stressors
Bereavement, relationship breakdown, financial crisis, job loss, legal problems and social humiliation can all precipitate suicidal crises, particularly in people with underlying vulnerability.

Social Isolation and Lack of Belonging
Loneliness and the feeling of being disconnected from others, of having no one to turn to, is a powerful driver of suicidal thinking. Social connection is one of the most protective factors against suicide.

Access to Lethal Means
The availability of means, particularly firearms, stockpiled medications or other lethal methods, significantly increases the risk that suicidal thinking will result in a fatal act. Restricting access to means saves lives.

Exposure to Suicide
Knowing someone who has died by suicide, or exposure to detailed or sensationalised media reporting of suicide, can increase risk in vulnerable individuals through a phenomenon known as contagion.

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Types of Suicidal Ideation

What are the different forms of suicidal experience?

Understanding the different ways suicidal distress can present helps identify the right level of intervention and support.

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Diagnosis & Assessment

How is suicide risk assessed?

Risk assessment is not about predicting with certainty who will and will not attempt suicide; no tool can do that. It is about understanding the current level of risk, the factors contributing to it and what immediate steps are needed to keep the person safe.

What Does a Suicide Risk Assessment Involve?

Direct questioning
A trained clinician will ask directly and compassionately about suicidal thoughts, their frequency, intensity, duration, the presence of a plan, access to means and any prior attempts. Direct questioning is not harmful; it is essential. The American Psychiatric Association's guidance on suicide prevention underscores that open, non-judgemental conversation is central to accurate risk assessment.

Mental Health Evaluation
Assessment of underlying mental health conditions — depression, bipolar disorder, psychosis, substance use and personality disorders that significantly elevate risk. Addressing the underlying condition is central to reducing suicide risk over the long term.

Assessment of protective factors
Risk assessment is not only about what increases risk; it also examines what is protective. Reasons for living, social connectedness, religious or cultural beliefs about suicide, responsibility for children or others, and engagement with treatment are all important protective factors.

Safety planning
Rather than a contract not to harm oneself, which has limited evidence, identifies personal warning signs, coping strategies, people to contact in a crisis and steps to reduce access to means. Safety planning is a practical, collaborative tool that meaningfully reduces short-term risk.

Assessment of the environment
Understanding the person's immediate environment — who they live with, what means are available in the home and what level of supervision is possible informs decisions about the appropriate level of care.

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Management & Treatment

How is suicidal crisis treated?

A suicidal crisis is a medical and psychiatric emergency. The response must be immediate, compassionate and clinically informed. Suicidal thoughts and behaviours are treatable, both in the acute crisis and the underlying conditions that drive it.

Crisis Intervention

The immediate priority in a suicidal crisis is safety, ensuring the person is not in immediate danger and that they have professional support.

Emergency services
If someone is in immediate danger of harming themselves, calling emergency services and ensuring they are not left alone is the first step. This is not a betrayal of trust; it is the most caring action possible in that moment.

Psychiatric emergency assessment
A psychiatrist will conduct a comprehensive risk assessment, determine the appropriate level of care — outpatient, intensive outpatient, partial hospitalisation or inpatient and initiate treatment.

Means restriction
Removing or securing access to lethal means in the person's environment — medications, firearms and sharp objects is one of the most evidence-based immediate interventions for reducing suicide risk.

Psychotherapy

Psychological treatment is the cornerstone of longer-term suicide prevention. Several therapies have strong evidence specifically for reducing suicidal thinking and behaviour.

Cognitive Behavioural Therapy for Suicide Prevention (CBT-SP)
Directly targets the thoughts, feelings and behaviours associated with suicidal crises. Helps the person identify warning signs, challenge hopelessness and develop a personalised safety plan.

Dialectical Behaviour Therapy (DBT)
Developed specifically for people with chronic suicidality and emotional dysregulation. Combines individual therapy with skills training in mindfulness, distress tolerance, emotion regulation and interpersonal effectiveness. Among the best-evidenced treatments for reducing suicide attempts.

Problem-Solving Therapy
Addresses the concrete life stressors and perceived lack of solutions that drive suicidal thinking. Builds practical problem-solving capacity and reduces feelings of being trapped.

Collaborative Assessment and Management of Suicidality (CAMS)
A framework for shared risk assessment and safety planning between the clinician and the person at risk. Strengthens therapeutic alliance and engages the person as an active participant in their own safety.

Medications

Medication alone does not treat suicidal thinking, but it plays an important role in addressing the underlying conditions that increase risk.

Antidepressants (SSRIs and SNRIs)
Treat the depression that underlies most suicidal crises. They take several weeks to reach full effect and require careful monitoring during initiation, particularly in young people.

Mood stabilisers (lithium)
Lithium has specific and well-evidenced anti-suicidal properties in people with bipolar disorder and recurrent depression, independent of its mood-stabilising effects.

Clozapine
For people with schizophrenia or schizoaffective disorder, clozapine has specific evidence for reducing suicidal behaviour.

Ketamine and esketamine
Emerging treatments that can produce rapid reduction in suicidal ideation in people with treatment-resistant depression, though they require specialist administration and monitoring.

Important: Medication changes should always be made under close clinical supervision. The period immediately after starting or changing antidepressants, particularly in children, adolescents and young adults, requires careful monitoring for any worsening of suicidal thinking.

Inpatient and Intensive Care

For people at high immediate risk, inpatient psychiatric admission provides a safe, structured environment for stabilisation, intensive treatment and careful discharge planning. The transition from hospital back to the community is one of the highest-risk periods; robust follow-up care and a clear safety plan are essential.

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Prevention

How Can Suicide Be Prevented?

Suicide prevention operates at multiple levels, from society-wide policy to the actions of an individual who notices a friend is struggling. Every level matters.

• Recognise and respond to warning signs: Learning to recognise the signs of suicidal distress in people we know and in ourselves is the starting point for prevention. Acting on what we notice, rather than hoping it will pass, saves lives.
• Ask directly and without judgement: If you are worried about someone, ask them directly: "Are you thinking about suicide?" Research consistently shows that asking does not increase risk; it reduces it. It communicates that you are willing to hear the answer and that the person is not alone.
• Listen without trying to fix: When someone shares suicidal thoughts, the most important response is to listen with full attention, take it seriously and stay present. Attempting to immediately provide solutions or minimise the pain can shut down communication.
• Remove access to lethal means: In a household where someone is at risk, securing or removing firearms, locking away medications and taking other steps to limit access to means is a practical and lifesaving act.
• Support treatment and follow through: Encouraging the person to engage with professional support and following up consistently is one of the most protective things a family member or friend can do. The period immediately after a crisis or a discharge from hospital is particularly important.
• Address mental health early: Many suicidal crises are preceded by months or years of untreated mental illness. Reducing stigma, increasing access to mental health care and treating depression, anxiety and other conditions effectively prevent the progression to suicidal crisis.
• Build social connection: Loneliness and isolation are powerful drivers of suicidal thinking. Maintaining contact with vulnerable individuals checking in regularly, including them and making it clear they matter is a direct protective act.
• Safe messaging around suicide: How suicide is discussed in media, online and in conversation affects risk in the community. Avoiding detailed descriptions of method, avoiding romanticisation and including crisis resources in reporting all reduce contagion risk.

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Living With Suicidal Thoughts

How Can a Person Manage Suicidal Thinking Day-to-Day?

For many people, suicidal thoughts are not a single acute crisis but a recurrent experience that requires ongoing management alongside professional care. Recovery is possible and people who have survived suicidal crises can and do build meaningful, connected lives.

• Stay connected to your treatment team: Regular contact with a psychiatrist, psychologist or counsellor, not just in acute moments, is the foundation of safe long-term management. Be honest about when thoughts intensify.
• Use your safety plan: A written safety plan is not just for emergencies; it is a practical document to return to whenever distress rises. Know your warning signs, your coping steps and who to call before the situation becomes critical.
• Identify your reasons for living: Working with a therapist to explicitly identify and document the people, values and experiences that give life meaning is a clinically meaningful exercise. Returning to this list in moments of crisis can be a powerful anchor.
• Reduce access to means at home: If you experience recurrent suicidal thinking, ensuring that means are not easily accessible in your home, giving medications to a trusted person to manage, removing or securing other items is a practical and effective protective step.
• Build a crisis contact network: Identify two or three people you trust and who know about your struggles. Agree with them in advance what it looks like when you need help and how they can reach you. Isolation during a crisis is one of its most dangerous features.
• Practise distress tolerance skills: Skills from DBT and other approaches, such as grounding techniques, paced breathing and riding out the urge without acting, can significantly reduce the intensity and duration of a suicidal crisis when practised consistently.

When should you act immediately?

• You have moved from passive thoughts to a specific plan or have taken steps to prepare.
• You have access to means and are thinking about using them.
• You feel that you cannot keep yourself safe in your current environment.
• The intensity of suicidal thinking has escalated rapidly.
• You have used substances to cope and your judgement is impaired.

In these situations, contact a mental health professional, go to the nearest emergency department or call a crisis line immediately. Do not wait until a convenient time. Do not attempt to manage this alone.

A Note on Seeking Help

Suicidal thinking is not a sign that a person is beyond help. It is a sign that they are in serious pain and need support that matches the severity of what they are experiencing. With the right care, the vast majority of people who go through suicidal crises recover and go on to live full lives.

If you or someone you care about is experiencing suicidal thoughts, speaking to a psychiatrist or mental health professional without delay is the most important step.

If you or someone you know is in crisis right now, call on 8901 901 901 or contact Athma Care on 9201 202 203. You do not have to wait.