Personality disorders, including Antisocial Personality Disorder (ASPD) and Narcissistic Personality Disorder (NPD), are typically characterized by persistent patterns of thoughts, behaviors, and emotions that deviate significantly from cultural expectations and lead to impairment or distress in various areas of life. These patterns usually start to manifest during late adolescence or early adulthood.
While personality traits can be observed in individuals before the age of 18, a diagnosis of a personality disorder is typically not made until the person is at least 18 years old. The reason for this is that personality traits and behaviors may still be in the process of development during adolescence, and some traits may diminish or change over time as the person matures and faces new life challenges.
The development and manifestation of personality disorders can vary from person to person. Some individuals may exhibit traits associated with personality disorders during their late teens or early 20s, but the full-blown disorder may not be diagnosed until they are in their 30s or later. However, it is important to note that a diagnosis should only be made by a qualified mental health professional based on a comprehensive assessment of the individual's history, behaviors, and functioning.
If you or someone you know is concerned about the presence of personality traits or disorder, it is essential to seek help from a mental health professional who can conduct a proper evaluation and provide appropriate guidance and support. Early intervention and treatment can be crucial in improving the person's well-being and functioning.