What is Mental Health? Well there's a question. The simplistic answer is that it's something everyone has. Yes, EVERYONE. You, me, that bloke over there. We all have mental health, but not everyone has mental ill-health, a.k.a. mental illness. 'What is mental illness?' is a much harder question to answer.

I guess we'd say that mental illness is a blanket term for a multitude of ailments affecting the noggin. There are many, MANY different conditions that would come under the banner of 'mental illness'. These may include the more commonly known ones like depression, anxiety, post-traumatic stress disorderbipolarOCD that we’re sure you’ve heard of, right through to the ones you may not have ever heard of, not to mention those you may not realise actually do come under that heading.

Here we try and explain some (if not all) of those conditions in terms everyone can (hopefully) understand and group them into their main categories (as determined by the DSM-5).

We're not trying to patronise anyone, but we understand that it may be new information for many. Whether you live with these conditions or not, we hope it expands your understanding, dispels any myths and / or helps fight the stigma that surrounds mental illness.

You'll probably notice we use terms like 'may', 'often' and 'some' in our explanations. We don't do this to sound vague or indecisive. The fact is, mental illness is an incredibly complex issue and even people with the same condition are likely to have different experiences or symptoms of it. Many of the conditions can be further divided into mild, major or severe conditions. What it means, and how it affects one person 'may' (look we're doing it again) differ from how it affects someone else. There isn't an exacting set of attributes that everyone will have to the same degree, so bear that in mind - unless you've skipped this page altogether then you'll be thinking we're just being vague or indecisive.

If you're looking for information on one particular condition, it may be worth using the 'Search' feature below. Still here? Good. So with all that in mind, what are....


Neurodevelopmental Disorders

The term ‘neurodevelopment disorders’ tends to be used to describe impairments of either brain function or the central nervous system; basically conditions that affect your emotions, your ability to learn, self-control and memory. Many of them may not be evident in young children, but they often become more obvious or pronounced as a person grows older. In many (but not all) cases, once manifested, they usually last for the entirety of a person’s life, but with the right support, the negative consequences can be negated, or at least, managed accordingly.

These kind of disorders are further segmented into the 8 sub-categories, which you can find out more by clicking the links below.

  • Intellectual Disabilities

    • Intellectual Disability (Intellectual Developmental Disorder)

    • Global Development Delay

    • Unspecified Intellectual Disability

  • Communication Disorders

    • Language Disorder

    • Speech Sound Disorder

    • Childhood-Onset Fluency Disorder (a.k.a Stuttering)

    • Social (Pragmatic) Communication Disorder

  • Autism Spectrum Disorders

    • Autism Spectrum Disorder

  • Attention-Deficit / Hyperactivity Disorder

    • Attention-Deficit / Hyperactivity Disorder

    • Other Specified Attention-Deficit / Hyperactivity Disorder

    • Unspecified Attention-Deficit / Hyperactivity Disorder

  • Specific Learning Disorder

    • Specified Learning Disorder

  • Motor Disorders (including Tic Disorders)

    • Developmental Coordination Disorder

    • Stereotypic Movement Disorder

    • Tourette’s Disorder

    • Persistent (Chronic) Motor (or Vocal) Tic Disorder

    • Provisional Tic Disorder

    • Other Specified Tic Disorder

    • Unspecified Tic Disorder

  • Other Neurodevelopment Disorders

    • Other Specified Neurodevelopment Disorder

    • Unspecified Neurodevelopmental Disorder

Schizophrenia Spectrum and Other Psychotic Disorders

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  • Schizotypal (Personality) Disorder

  • Delusional Disorder

  • Brief Psychotic Disorder

  • Schizophreniform Disorder

  • Schizophrenia

  • Schizoaffective Disorder (including Bipolar and Depressive types)

  • Substance / Medication-Induced Psychotic Disorder

  • Psychotic Disorder Due To Another Medical Condition

  • Catatonia Associated with Another Mental Disorder

  • Catatonic Disorder Due to Another Medical Condition

  • Other Specified Schizophrenia Spectrum and Other Psychotic Disorder

Bipolar and Related Disorders

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  • Bipolar I Disorder

  • Bipolar II Disorder

  • Cyclothymic Disorder

  • Substance- / Medication-Induced Bipolar and Related Disorder

  • Bipolar and Related Disorder Due to Another Medical Condition

  • Other Specified Bipolar and Related Disorder

  • Unspecified Bipolar and Related Disorder

Depressive Disorders

  • Disruptive Mood Dysregulation Disorder

  • Major Depressive Disorder

  • Persistent Depressive Disorder (a.k.a. Dysthymia)

  • Premenstrual Dysphoric Disorder

  • Substance- / Medication-Induced Depressive Disorder

  • Depressive Disorder Due to Another Medical Condition

  • Other Specified Depressive Disorder

  • Unspecified Depressive Disorder

Anxiety Disorders

  • Separation Anxiety Disorder

  • Selective Mutism

  • Phobia

  • Social Anxiety Disorder (a.k.a. Social Phobia)

  • Panic Disorder

  • Panic Attack Specifier

  • Agoraphobia

  • Generalised Anxiety Disorder

  • Substance- / Medication-Induced Anxiety Disorder

  • Anxiety Disorder Due to Another Medical Condition

  • Other Specified Anxiety Disorder

  • Unspecified Anxiety Disorder

Obsessive-Compulsive and Related Disorders

Trauma- and Stressor-Related Disorders

  • Reactive Attachment Disorder

  • Disinhibited Social Engagement Disorder

  • Post-Traumatic Stress Disorder

  • Acute Stress Disorder

  • Adjustment Disorder

  • Other Specified Trauma- and Stressor-Related Disorder

  • Unspecified Trauma- and Stressor-Related Disorder

Dissociative Disorders

  • Dissociative Identity Disorder

  • Dissociative Amnesia

  • Depersonalisation / Derealisation Disorder

  • Other Specified Dissociative Disorder

  • Unspecified Dissociative Disorder

Somatic Symptom and Related Disorders

  • Somatic Symptom Disorder

  • Illness Anxiety Disorder

  • Conversion Disorder (Functional Neurological Symptom Disorder)

  • Psychological Factors Affecting Other Medical Conditions

  • Factitious Disorder

  • Other Specified Somatic Symptom and Related Disorder

  • Unspecified Somatic Symptom and Related Disorder

Feeding and Eating Disorders

  • Pica

  • Rumination Disorder

  • Avoidant / Restrictive Food Intake Disorder

  • Anorexia Nervosa

  • Bulimia Nervosa

  • Binge-Eating Disorder

  • Other Specified Feeding or Eating Disorder

  • Unspecified Feeding or Eating Disorder

Elimination Disorders

  • Enuresis

  • Encopresis

  • Other Specified Elimination Disorder

  • Unspecified Elimination Disorder

Sleep-Wake Disorders

  • Insomnia Disorder

  • Hypersomnolence Disorder

  • Narcolepsy


  • Obstructive Sleep Apnea Hypopnea

  • Central Sleep Apnea

  • Sleep-Related Hypoventilation

  • Circadian Rhythm Sleep-Wake Disorder


  • Non-Rapid Eye Movement Sleep Arousal Disorders

  • Nightmare Disorder

  • Rapid Eye Movement Sleep Behaviour Disorder

  • Restless Legs Syndrome

  • Substance / Medication-Induced Sleep Disorder

  • Other Specified Insomnia Disorder

  • Unspecified Insomnia Disorder

  • Other Specified Hyper-somnolence Disorder

  • Unspecified Hyper-somnolence Disorder

  • Other Specified Sleep-Wake Disorder

  • Unspecified Sleep-Wake Disorder

Sexual Dysfunctions

  • Delayed Ejaculation

  • Erectile Disorder

  • Female Orgasmic Disorder

  • Female Sexual Interest / Arousal Disorder

  • Genito-Pelvic Pain / Penetration Disorder

  • Male Hypoactive Sexual Desire Disorder

  • Premature (Early) Ejaculation

  • Substance / Medication-Induced Sexual Dysfunction

  • Other Specified Sexual Dysfunction

  • Unspecified Sexual Dysfunction

Gender Dysphoria

  • Gender Dysphoria

  • Other Specified Gender Dysphoria

  • Unspecified Gender Dysphoria

Disruptive, Impulse-Control and Conduct Disorders

  • Oppositional Defiant Disorder

  • Intermittent Explosive Disorder

  • Conduct Disorder

  • Antisocial Personality Disorder

  • Pyromania

  • Kleptomania

  • Other Specified Disruptive, Impulse-Control and Conduct Disorder

  • Unspecified Disruptive, Impulse-Control and Conduct Disorder

Substance-Related and Addictive Disorders


  • Alcohol-Related Disorders

  • Alcohol Intoxication

  • Alcohol Withdrawal

  • Other Alcohol-Induced Disorders

  • Unspecified Alcohol-Related Disorder


  • Caffeine Intoxication

  • Caffeine Withdrawal

  • Other Caffeine-Induced Disorders

  • Unspecified Caffeine-Related Disorder


  • Cannabis Use Disorder

  • Cannabis Intoxication

  • Cannabis Withdrawal

  • Other Cannabis-Induced Disorders

  • Unspecified Cannabis-Related Disorder


  • Phencyclidine Use Disorder

  • Other Hallucinogen Use Disorder

  • Phencyclidine Intoxication

  • Other Hallucinogen Intoxication

  • Hallucinogen Persisting Perception Disorder

  • Other Phencyclidine-Induced Disorders

  • Other Hallucinogen-Induced Disorders

  • Unspecified Phencyclidine-Related Disorder

  • Unspecified Hallucinogen-Related Disorder

Inhalant-Related Disorders

  • Inhalant Use Disorder

  • Inhalant Intoxication

  • Other Inhalant-Induced Disorder

  • Unspecified Inhalant-Related Disorder


  • Opioid Use Disorder

  • Opioid Intoxication

  • Opioid Withdrawal

  • Other Opioid-Induced Disorders

  • Unspecified Opioid-Related Disorder

Neurocognitive Disorders

  • Delirium

  • Other Specified Delirium

  • Unspecified Delirium


Personality Disorders


    • Paranoid Personality Disorder

    • Schzoid Personality Disorder

    • Schizotypal Personality Disorder


    • Antisocial Personality Disorder

    • Borderline Personality Disorder

    • Histrionic Personality Disorder

    • Narcissistic Personality Disorder


    • Avoidant Personality Disorder

    • Dependant Personality Disorder

    • Obsessive-Compulsive Personality Disorder


    • Personality Change Due To Another Medical Condition

    • Other Specified Personality Disorder

    • Unspecified Personality Disorder

Paraphilic Disorders

  • Voyeuristic Disorder

  • Exhibitionistic Disorder

  • Frotteuristic Disorder

  • Sexual Masochism Disorder

  • Sexual Sadism Disorder

  • Pedophilic Disorder

  • Fetishistic Disorder

  • Transvestic Disorder

  • Other Specified Paraphilic Disorder

  • Unspecified Paraphilic Disorder

Medication-Induced Movement Disorders & Other Adverse Effects of Medication

  • Neuroleptic-Induced Parkinsonism

  • Other Mediation-Induced Parkinsonism

  • Neuroleptic Malignant Syndrome

  • Medication-Induced Acute Dystonia

  • Medication-Induced Acute Akathisia

  • Tardive Dyskinesia

  • Tardive Dystonia

  • Tardive Akathisia

  • Medication-Induced Postural Tremor

  • Other Medication-Induced Movement Disorder

  • Anti-depressant Discontinuation Syndrome

  • Other Adverse Effect of Medication

Other Mental Disorders