Which mental health condition primarily involves irrational behavior and anxiety?

Neurosis encompasses a range of mental health conditions characterized by irrational behavior, anxiety, and emotional distress that does not involve a break from reality. Individuals experiencing neurosis may display symptoms such as excessive worry, phobias, or obsessive behaviors, but they maintain an understanding of their circumstances and do not experience hallucinations or delusions. This ability to recognize their condition differentiates neurosis from other more severe mental disorders.

In contrast, schizophrenia and psychosis typically involve a significant detachment from reality, including symptoms like hallucinations and delusions, which are not present in neurosis. Bipolar disorder involves extreme mood swings, including episodes of mania and depression, but does not primarily focus on irrational behavior or anxiety in the same way that neurosis does. Thus, neurosis is the best fit for a condition primarily defined by irrational behavior and anxiety.