Mental Health Library
Clear information. Responsible next steps.
Source-backed English guides to mental health conditions, written to help you understand patterns and available support without replacing a professional assessment.
These guides are educational and non-diagnostic. If there is immediate danger, call 112 or go to the nearest hospital emergency department.
Reviewed collection
Begin with the question that brought you here
Explore all 84 published guides below. Each page explains signs, assessment, evidence-based support, safety and relevant Brain Balance services.
Scientific review: 10 August 2026
Scientific lead: Dionysis Ntozis
Latest English adaptation: 21 August 2026
Condition guides
Browse alphabetically or use your browser’s page search to find a specific topic.
Acute Stress Disorder
Early trauma responses, assessment, practical safety and trauma-focused support.
Adjustment Disorders
Significant emotional or behavioural difficulty following an identifiable stressor.
Anorexia Nervosa
Restriction, weight and shape concerns, health risks and coordinated care.
Antisocial Personality Disorder
A long-term pattern of disregarding others’ rights that begins before adulthood.
Attention-Deficit/Hyperactivity Disorder (ADHD)
Attention regulation, impulsivity, assessment across settings and practical support.
Autism Spectrum Disorder
Social communication, sensory processing, flexibility and individualised support.
Avoidant Personality Disorder
Social inhibition, feelings of inadequacy and sensitivity to rejection.
Avoidant/Restrictive Food Intake Disorder (ARFID)
Food restriction driven by sensory sensitivity, low interest or feared consequences.
Binge-Eating Disorder
Loss-of-control eating, distress and evidence-based psychological care.
Bipolar I Disorder
Manic episodes, mood changes, coordinated care and relapse prevention.
Bipolar II Disorder
Hypomanic and depressive episodes, assessment and coordinated treatment.
Body Dysmorphic Disorder
Appearance preoccupation, checking, avoidance and evidence-based treatment.
Borderline Personality Disorder
Emotional instability, relationships, safety and structured psychotherapy.
Brief Psychotic Disorder
Sudden psychotic symptoms lasting from one day to under one month.
Catatonia
A serious psychomotor syndrome involving marked changes in movement and responsiveness.
Childhood-Onset Fluency Disorder
Persistent disruptions in speech flow and timing that affect communication or participation.
Circadian Rhythm Sleep-Wake Disorders
A persistent mismatch between the body clock and the sleep schedule required by daily life.
Conduct Disorder
A persistent pattern that violates others’ rights or major age-appropriate rules.
Cyclothymic Disorder
A chronic pattern of subthreshold mood changes and coordinated care.
Delusional Disorder
Persistent fixed beliefs with relatively preserved functioning outside their effects.
Dependent Personality Disorder
An enduring excessive need for care that drives submissiveness and fear of separation.
Depersonalization/Derealization Disorder
Persistent detachment from oneself or surroundings with intact reality testing.
Developmental Coordination Disorder
Persistent motor-coordination difficulties affecting self-care, school, play or work.
Disruptive Mood Dysregulation Disorder (DMDD)
Chronic severe irritability and recurrent outbursts in children and adolescents.
Dissociative Amnesia
Autobiographical memory loss beyond ordinary forgetting, often linked to severe stress or trauma.
Dissociative Identity Disorder
Identity discontinuity with recurrent memory gaps beyond ordinary forgetting.
Enuresis and Encopresis
Repeated wetting or soiling beyond the expected developmental age.
Excoriation (Skin-Picking) Disorder
Repeated skin picking, wound care and habit-reversal treatment.
Factitious Disorder
Fabricated or induced illness with documented deception, imposed on oneself or another.
Functional Neurological Symptom Disorder (FND)
Real involuntary neurological symptoms diagnosed through positive clinical signs.
Gambling Disorder
Loss of control over gambling and its financial, relational and safety effects.
Gender Dysphoria
Clinically significant distress related to incongruence—not a diagnosis of identity itself.
Generalized Anxiety Disorder
Persistent worry, physical tension, assessment and evidence-based support.
Histrionic Personality Disorder
An enduring pattern of intense emotional expression and attention-seeking that impairs life.
Hoarding Disorder
Difficulty discarding, congested living spaces and respectful support.
Hypersomnolence Disorder
Excessive sleepiness despite at least seven hours of main sleep.
Illness Anxiety Disorder
Persistent fear of serious illness despite absent or mild physical symptoms.
Insomnia Disorder
Persistent sleep difficulty and cognitive behavioural therapy for insomnia.
Intellectual Developmental Disorder and Global Developmental Delay
Developmental needs affecting intellectual and everyday adaptive functioning.
Intermittent Explosive Disorder
Recurrent impulsive aggression far out of proportion to the trigger.
Kleptomania
Repeated difficulty resisting an impulse to steal items not needed for use or value.
Language Disorder
Persistent difficulty understanding or using vocabulary, sentences and connected language.
Major Depressive Disorder
Depressed mood, loss of interest, functional impact and treatment options.
Narcissistic Personality Disorder
An enduring pattern of grandiosity, need for admiration and reduced empathy.
Narcolepsy
A neurological disorder causing irresistible daytime sleepiness, sometimes with cataplexy.
Non-Rapid Eye Movement Sleep Arousal Disorders
Incomplete awakening from deeper NREM sleep with sleepwalking or sleep terrors.
Obsessive-Compulsive Disorder
Intrusive obsessions, compulsions and exposure-based treatment.
Obsessive-Compulsive Personality Disorder
An enduring preoccupation with order, perfectionism and control that reduces flexibility.
Oppositional Defiant Disorder
Persistent irritability, argumentative behaviour or vindictiveness beyond developmental expectations.
Other Depressive Presentations and Specifiers
Clinically important depressive patterns, subthreshold presentations and specifiers.
Other Specified Feeding or Eating Disorder (OSFED)
Serious eating-disorder patterns that differ from another diagnosis by one threshold.
Paranoid Personality Disorder
A longstanding pattern of distrust in which others’ motives are interpreted as harmful.
Persistent Depressive Disorder
Long-lasting depressive symptoms that can become mistaken for personality.
Pica
Persistent eating of non-food, non-nutritive substances beyond the expected developmental stage.
Post-Traumatic Stress Disorder
Re-experiencing, avoidance, heightened threat and trauma-focused care.
Prolonged Grief Disorder
Persistent, impairing grief after bereavement and specialised support.
Pyromania
Repeated deliberate fire-setting with tension beforehand and fascination or relief around fire.
Schizoaffective Disorder
Psychotic symptoms and major mood episodes defined by their long-term timing.
Schizoid Personality Disorder
A longstanding pattern of social detachment and limited interpersonal emotional expression.
Schizophrenia
Psychotic symptoms, functioning, specialist treatment and recovery support.
Schizophreniform Disorder
Core psychotic symptoms lasting at least one month but under six months.
Schizotypal Personality Disorder
An enduring pattern of relationship difficulty, unusual thinking or perception and eccentricity.
Selective Mutism
Anxiety-related inability to speak in settings where speech is expected.
Separation Anxiety Disorder
Excessive fear of separation in children, adolescents and adults.
Sexual Dysfunctions
Persistent sexual-response difficulty that causes clinically significant personal distress.
Social (Pragmatic) Communication Disorder
Persistent difficulty using verbal and non-verbal communication in social contexts.
Social Anxiety Disorder
Fear of scrutiny, avoidance and the difference from ordinary shyness.
Somatic Symptom Disorder
Real physical symptoms accompanied by persistent disproportionate concern and disruption.
Specific Learning Disorder
Persistent difficulty learning reading, writing or mathematics despite targeted support.
Specific Phobia
Persistent fear of a specific object or situation and gradual exposure treatment.
Speech Sound Disorder
Persistent sound-production difficulty that reduces intelligibility or spoken communication.
Stereotypic Movement Disorder
Repetitive movements that interfere with participation or create a risk of injury.
Substance Use Disorders
Loss of control, harmful use, treatment, withdrawal and overdose safety.
Substance/Medication-Induced Anxiety Disorder
Clinically significant anxiety or panic linked to intoxication, withdrawal or medicine exposure.
Substance/Medication-Induced Bipolar and Related Disorder
A manic-type mood and energy change causally linked to a substance, medicine or withdrawal.
Substance/Medication-Induced Depressive Disorder
Depressed mood or loss of interest causally linked to exposure, intoxication or withdrawal.
Substance/Medication-Induced Obsessive-Compulsive and Related Disorder
Obsessions, compulsions or related repetitive behaviours causally linked to an exposure.
Substance/Medication-Induced Psychotic Disorder
Delusions or hallucinations linked clinically to a substance, medicine or withdrawal.