CHAPTER H8 – CONDITIONS (Modules 37–44)

 

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Module H8–37: Hallucinogen Use Disorder

A substance-related disorder involving repeated use of hallucinogenic drugs (e.g. LSD, psilocybin, PCP) that leads to impairment or distress.

Key symptoms:

• Strong cravings
• Loss of control over use
• Social, school, or work problems

Long-term effects:

• Hallucinogen Persisting Perception Disorder (HPPD) (flashbacks)
• Anxiety
• Depression
• Possible psychosis in vulnerable individuals

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Module H8–38: Haltlose Personality Disorder (Historical)

A now-obsolete psychiatric diagnosis (mainly early 20th century Europe).

Key characteristics:

• Extreme impulsivity
• Lack of long-term planning
• Emotional instability
• Self-centred or reckless behaviour

Modern understanding:

• Not in DSM-5
• Often overlaps with:
  • Antisocial personality traits
  • Borderline personality traits

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Module H8–39: Hoarding Disorder

A mental health condition where a person finds it extremely difficult to discard possessions.

Core features:

• Strong distress when throwing things away
• Excessive accumulation of items
• Living spaces become cluttered and unusable

Key distinction:

• Not the same as collecting (collecting is organised; hoarding is chaotic and distressing)

Impact:

• Unsafe living conditions
• Social isolation
• Anxiety and functional impairment

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Module H8–40: Huntington’s Disease

A progressive genetic neurodegenerative condition affecting movement, thinking, and mental health.

Symptoms:

• Involuntary movements (chorea)
• Memory and thinking decline
• Depression and irritability
• Apathy and OCD-like behaviours

Cognitive effects:

• Poor planning and decision-making
• Loss of executive function

Progression:

• Worsens over time (no cure currently)

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Module H8–41: Hyperkinetic Syndrome

An older term (mainly European) used to describe severe ADHD-like symptoms in children.

Features:

• Extreme hyperactivity
• Impulsivity
• Poor attention control

Modern classification:

• Now generally considered part of ADHD diagnosis

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Module H8–42: Hypersomnia

A sleep disorder or symptom involving excessive daytime sleepiness.

Symptoms:

• Sleeping for long periods
• Still feeling tired after sleep
• Difficulty staying awake during the day

Causes:

• Depression
• Sleep disorders
• Neurological conditions

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Module H8–43: Hypomania

A mood state linked to Bipolar II disorder.

Symptoms:

• Increased energy
• Reduced need for sleep
• Elevated or irritable mood
• Increased activity or talkativeness

Important note:

• Less severe than mania
• Does not usually cause psychosis or severe impairment

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Module H8–44: Histrionic Personality Disorder

A personality disorder involving excessive emotional expression and attention-seeking behaviour.

Characteristics:

• Strong need to be the centre of attention
• Dramatic or theatrical behaviour
• Rapidly shifting emotions
• Attention-seeking appearance or behaviour

Impact:

• Relationship difficulties
• Emotional instability in social situations

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🧠 Cross-links in Chapter H8

These conditions often overlap in real-world mental health:

• Impulsivity → Haltlose traits, ADHD, substance misuse
• Mood instability → Hypomania, personality disorders
• Cognitive decline → Huntington’s disease
• Behavioural dysregulation → Hoarding, substance disorders