Trauma/stress, feeding/eating, personality disorders

Trauma and stressor related disorders

Trauma and stressor related disorders occur when exposure to a severely upsetting or harmful event leads to lasting mental and emotional effects.

The defining feature is that symptoms begin only after a clearly identifiable stressful or traumatic incident (whether directly experienced, witnessed, or learned about in connection to someone else). Examples include violent crime, war combat, sexual assault, severe injury, or environmental catastrophes. The initiating event is typically intense and highly disruptive, rather than a generalized worry or a gradual build-up of stress.

Posttraumatic stress disorder (PTSD) is one of the most well-known trauma and stressor related disorders. In PTSD, symptoms last more than one month and significantly interfere with daily life. Common symptoms include:

• Flashbacks to stressful or traumatic experiences: Recurring, involuntary memories, disturbing dreams, or vivid flashbacks can make the person feel as if they are back in the traumatic situation. Reminders of the event may trigger intense emotional and physical distress.
• Shifts in mood and cognition: A person may develop persistent beliefs that the world is unsafe or that they were personally responsible for what happened. Feelings of emptiness, emotional detachment, or loss of interest may become dominant.
• Heightened arousal and reactivity: Hypervigilance (increased alertness to one’s surroundings) , hostility, severe anxiety, and insomnia (difficulty sleeping) are common. Other symptoms can include an increased startle response, difficulty concentrating, and memory problems.
• Avoidant behavior: Attempts to avoid people, places, activities, or conversations linked to the trauma may severely limit social or occupational functioning.

Multiple interacting influences may shape a person’s risk and recovery path:

• Inherited tendencies: Biological patterns linked to mood or anxiety disorders may increase the likelihood of developing PTSD after a stressful event.
• Thinking patterns: Persistent guilt, distorted self-evaluation, and difficulty organizing the experience into a coherent personal narrative can intensify symptoms.
• Behavioral learning: Fear responses can become conditioned and then reinforced when avoidance temporarily reduces anxiety, making the pattern harder to change.
• Cultural and social context: The availability of emotional support, shared beliefs about coping, and stigma around seeking help can influence outcomes.

What is the defining feature that distinguishes trauma and stressor related disorders from general stress or worry?

Feeding and eating disorders

Feeding and eating disorders involve disruptive patterns of eating behavior or food absorption, along with psychological distress and harmful physical consequences. They go beyond occasional overeating or short-term dieting. They develop not from a lack of willpower or vanity, but from distorted cognitive or emotional responses that lead to maladaptive eating behaviors.

Feeding disorders involve insufficient dietary intake and may be related to problems such as swallowing, chewing, choking, food sensitivities, or food aversions. Eating disorders also involve insufficient dietary intake, but the restriction is driven by concerns about body shape or weight and may include behaviors such as food restriction, purging, or bingeing. Anorexia nervosa and bulimia nervosa are two types of eating disorders.

Anorexia nervosa

This condition involves self-imposed restriction of food intake, leading to significantly low body weight, along with a distorted body image and an intense fear of weight gain. These beliefs can drive extreme behaviors that interfere with healthy weight restoration (such as overexercising or starvation). The underlying cognitive or emotional distortion may cause the person to see themselves as heavier than they are.

Physical effects can include severe muscle loss, weakened heart function, hormonal irregularities such as menstrual absence in females, brittle nails or hair, and possible damage to multiple organs. Among psychological disorders, anorexia nervosa has the highest mortality rate.

Bulimia nervosa

Bulimia nervosa involves episodes of eating a large amount of food in a short time (binges), along with a feeling of loss of control. After bingeing, individuals often use compensatory behaviors such as purging (vomiting or misuse of laxatives), prolonged fasting, or exhausting exercise routines. Concerns about body image are common, and self-worth is often closely tied to weight and shape.

To meet diagnostic guidelines, these binge-purge cycles generally occur at least once a week over several months. Physical risks include electrolyte imbalances, injury to the digestive tract, and tooth erosion from exposure to stomach acid.

Possible contributors of feeding or eating disorders

• Sociocultural pressure: Idealized body images in media, competitive environments that emphasize appearance (such as dance or modeling), and peer influence can increase risk.
• Biological or genetic: Family tendencies toward anxiety, perfectionism, or impulsivity may increase risk. Imbalances in neurotransmitters such as serotonin or dopamine may affect hunger and reward systems.
• Cognitive factors: Unrealistic self-evaluations, rigid standards for body appearance, and overgeneralized negative beliefs about weight can fuel harmful behaviors.
• Behavioral patterns: Praise for being a certain weight or having a certain body shape, or relief from anxiety after restricting food, can reinforce the cycle. Similarly, temporary emotional comfort from binge eating may strengthen that habit.
• Family environment: Excessive criticism, over-involvement, or a strong focus on appearance within the family can interact with individual vulnerabilities.

How do the symptoms of anorexia nervosa differ from those of bulimia nervosa in feeding and eating disorders?

Personality disorders

Personality disorders are chronic, rigid, and pervasive patterns of thinking, feeling, and behaving that deviate markedly from cultural expectations. These traits typically become noticeable by adolescence or early adulthood, remain relatively stable over time, and cause distress or functional impairment.

Cluster A: odd or eccentric

Shared feature: Social withdrawal combined with atypical thought patterns.

• Paranoid personality disorder: Persistent distrust and suspicion of others, often interpreting their motives as harmful.
• Schizoid personality disorder: Little interest in close relationships and limited emotional expression.
• Schizotypal personality disorder: Social discomfort, unconventional thinking, and unusual sensory perceptions.

Cluster B: dramatic, emotional, or erratic

Shared feature: Rapid emotional shifts, impulsive behavior, and unstable relationships.

• Antisocial personality disorder: Disregard for others’ rights, impulsive behavior, and lack of remorse for harm done.
• Histrionic personality disorder: Strong need for attention and approval, with exaggerated emotional expression.
• Narcissistic personality disorder: Excessive self-importance, need for admiration, and disregard for others’ feelings.
• Borderline personality disorder (BPD): Intense, unstable relationships, abrupt mood shifts, impulsive actions, and strong fears of abandonment.

Cluster C: anxious or fearful

Shared feature: Long-term anxiety that shapes relationships and self-perception.

• Avoidant personality disorder: Extreme sensitivity to rejection, feelings of inadequacy, and reluctance to engage socially.
• Dependent personality disorder: Strong reliance on others for approval and decision-making, with fear of separation.
• Obsessive-compulsive personality disorder: Preoccupation with rules, structure, and control at the expense of flexibility.

Possible contributing influences of personality disorders

• Biological or genetic traits: Impulsivity, emotional reactivity, and temperament differences may be influenced by genetics. Brain factors, such as reduced capacity for emotional regulation (especially in prefrontal regions), may also play a role.
• Cognitive patterns: Long-lasting, distorted self-concepts and worldviews often trace back to early experiences.
• Behavioral learning: Relationship strategies and coping styles reinforced in early family and peer contexts can persist into adulthood.
• Environmental, social, or cultural factors: Childhood neglect, inconsistent caregiving, or abuse; and societal norms that shape expectations around independence or conformity.