10 Personality and Other Behavioral Disorders
Understand how personality and behavioral disorders are identified, how co-occurring needs shape assessment and care, and what treatment and recovery support may involve.
Recognizing
involve enduring patterns of thinking, feeling, relating to others, or controlling behavior. These patterns are inflexible, differ significantly from cultural expectations, and cause distress or problems in daily functioning. They generally begin by adolescence or early adulthood.
A diagnosis requires assessment of a person’s history and functioning by a qualified mental health professional. A single difficult behavior or conflict is not enough to establish a diagnosis. These are persistent, impairing patterns—not character flaws or isolated behaviors.
Personality disorder clusters
The ten are often grouped into three descriptive clusters:
: unusual or socially detached patterns, including paranoid, schizoid, and schizotypal .
: dramatic, emotional, or unpredictable patterns, including antisocial, borderline, histrionic, and narcissistic .
: anxious or fearful patterns, including avoidant, dependent, and obsessive-compulsive .
These clusters are a classification aid, not a substitute for individualized assessment. involves a pervasive pattern of perfectionism and control. , by contrast, involves unwanted, intrusive thoughts and/or repetitive behaviors.
Other behavioral disorders
“Behavioral disorder” is a broad, non-specific term, not one diagnosis. One diagnostic grouping is , which includes conditions characterized by persistent difficulty regulating behavior or respecting others’ rights and rules.
Conduct disorder is diagnosed in children or adolescents when an ongoing pattern of behavior significantly harms others or violates important rules. Assessment should consider age and development, family and school context, trauma, substance use, medical factors, and other possible mental health conditions.
and assessment
Personality and behavioral disorders may occur alongside depression, anxiety, trauma-related conditions, attention-deficit/hyperactivity disorder, eating disorders, substance use disorders, or physical health problems. Overlapping symptoms can make diagnosis more complex.
Impulsivity, for example, can occur in more than one condition. Clinicians consider the full pattern over time and whether symptoms occur in episodes. Assessment should also identify strengths, treatment preferences, physical-health needs, and any risk of self-harm, suicide, or harm to others.
Coordinating care
When mental health and substance use disorders co-occur, both should be assessed and addressed. Coordinated or helps avoid gaps in care and supports a plan tailored to the person’s needs.
For example, a person using alcohol to manage anxiety may benefit from a plan that addresses anxiety and substance use together, rather than postponing care for one condition until the other is resolved.
Treatment approaches
Psychotherapy is central to treatment for . Depending on a person’s needs, treatment may include , , or other structured therapies. DBT builds skills for managing intense emotions, reducing harmful behaviors, and improving relationships.
Medication does not treat the underlying personality pattern, but a prescriber may use it for specific symptoms or . Treatment choices should be collaborative and regularly reviewed.
Recovery support and communication
Recovery support is ongoing and person-centered. A practical plan may include:
Shared goals, regular follow-up, and a clear route to re-enter care if difficulties return.
Skills practice, healthy routines, social connection, and attention to physical health.
Peer support and family or community supports chosen by the person.
Help connecting with housing, education, or employment services when needed.
Early recognition of warning signs and agreed steps for a worsening crisis.
Communication should be respectful and nonjudgmental. Describe observable behavior rather than labeling the person, listen actively, validate feelings without endorsing unsafe actions, and set clear, consistent boundaries. Take statements about suicide or self-harm seriously. In the United States, call or text 988 for crisis support; if there is immediate danger, contact emergency services.