The current study aimed to compare early adult neuroticism between the sexes. Investigating the relationship between early adult neuroticism and stress, anxiety, and depression was the other objective. The current study was carried out using a cross-sectional survey research approach. Each subject was contacted directly by the researcher, and each person's data was gathered separately. The study's 200 participants included an equal number of male and female pupils. A purposive sample method was used when selecting the participants. A Big Five Inventory (BFI) subscale was used to quantify neuroticism.Generally,the BFI dependability varied from 0.80 to 0.89. The scale for stress, anxiety, and depression was also used. Among young adults, neuroticism is a positive predictor of stress, anxiety, and depression. In summary, this research offers valuable insights into how personality traits impact mental health and how neuroticism plays a part in predicting the likelihood of internalizing psychological issues in early adulthood.