This study examined the relationships between psychiatric symptomatology, Big Five personality traits, internet addiction, and distress disclosure among young adults. A total of 244 participants (104 males, 139 females, and 1 who did not specify gender), aged between 15 and over 26 years, completed an online survey using standardized measures including the Symptom Checklist-90, Big Five Inventory, Internet Addiction Test, and Distress Disclosure Index. Descriptive statistics, Pearson correlations, and multiple regression analyses were conducted to explore the associations between variables. The results indicated that internet addiction showed significant positive correlations with most psychiatric symptom dimensions, particularly depression, anxiety, obsessive-compulsive tendencies, and interpersonal sensitivity. Neuroticism was positively associated with psychiatric symptoms and internet addiction, whereas conscientiousness and agreeableness demonstrated negative associations. Distress disclosure displayed mixed patterns, with higher disclosure linked to lower levels of certain symptoms but higher scores of internet addiction in specific cases. Regression analyses revealed that depression, anxiety, and neuroticism were significant predictors of internet addiction, together accounting for a substantial proportion of variance. These findings underscore the complex interplay between psychological distress, personality characteristics, and online behaviour, suggesting that interventions targeting emotional regulation and personality-linked vulnerabilities may be effective in reducing internet addiction risk among young adults.