Purpose/Significance To explore the formation mechanism of cyberchondria in adolescent mental problems, and to provide theoretical support for the development of intervention strategies. Method/Process Based on the ecological systems theory, a model of influencing mechanisms is constructed at the micro, meso, and macro levels. A measurement tool for cyberchondria in adolescent mental problems is developed by adapting the CSS-12 scale. Structural equation model is conducted using SmartPLS to analyze 740 adolescent samples. Result/Conclusion At the micro level, rumination, social anxiety, and pathological internet use positively influence cyberchondria. At the meso level, parental monitoring positively influences cyberchondria through the mediating role of pathological internet use. Although positive intervention reduces pathological internet use, it unexpectedly exacerbates symptoms due to a masking effect.At the macro level, mental illness stigma positively influences cyberchondria through rumination, social anxiety, and pathological internet use. It extends the research on cyberchondria to the field of mental health, offering insights for interventions and management strategies aimed at addressing cyberchondria in adolescents.