Highly Sensitive Person, or HSP, is a term coined by psychologist Elaine Aron. According to Aron’s theory, HSPs are a subset of the population who are high in a personality trait known as sensory-processing sensitivity , or SPS. People with high levels of SPS have increased emotional sensitivity, stronger reactivity to both external and internal stimuli—pain, hunger, light, and noise—and a complex
Why Does Highly Sensitive Person Develop?
Understanding what causes highly sensitive person is essential for prevention and treatment. Research consistently shows that highly sensitive person arises from a complex interplay of biological, psychological, and social factors — rarely from a single cause.
What Researchers Have Found
Research into highly sensitive person has identified multiple contributing pathways. Studies using neuroimaging, genetics, and longitudinal data reveal that no single factor fully explains why highly sensitive person develops.
Biological Factors
Biological contributors to highly sensitive person include:
- Genetics: Family history increases risk; certain genes influence vulnerability
- Brain chemistry: Neurotransmitter imbalances (serotonin, dopamine, norepinephrine) play key roles
- Brain structure: Differences in the prefrontal cortex, amygdala, and hippocampus are documented
- Physical health: Chronic illness, hormonal changes, and sleep disruption can trigger or worsen highly sensitive person
Psychological Factors
- Early experiences: Childhood adversity, attachment disruption, and trauma shape psychological vulnerability
- Cognitive patterns: Negative thinking styles, perfectionism, and rumination increase risk
- Coping skills: Limited emotional regulation skills make highly sensitive person more likely under stress
- Personality: Certain traits (neuroticism, harm avoidance) are associated with higher risk
Social and Environmental Factors
Environmental factors — including chronic stress, relationship problems, financial difficulty, and major life events — can trigger highly sensitive person in vulnerable individuals.
What Triggers an Episode?
Even in people with predisposing factors, highly sensitive person often requires a triggering event:
- Major life transitions (job loss, relationship breakdown, bereavement)
- Prolonged stress without adequate recovery
- Substance use or withdrawal
- Physical illness or injury
- Social isolation or conflict
Protective Factors
Not everyone with risk factors develops highly sensitive person. Protective factors include: strong social support, effective coping skills, physical health maintenance, access to care, and psychological resilience built through prior challenges.