Neuroticism - The Neuroticism Dimension of Personality

Neuroticism is a personality trait, not a mental health condition.

This mostly happens because neurotic people have a tendency to complain, be critical in minor issues, ask for reassurance, and be overly dependent on others.

Self-Conscious Emotions and Big Five Personality Traits and Their Relations to Anxiety Disorders Symptoms in Young, Non-Clinical Adolescents.

Those who are low in both Neuroticism and Extraversion tend to be somewhat emotionally flat, with few experiences of either negative or positive emotions.