International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Volume 8 Issue 4
July-August 2026

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From Diathesis to Disorder : A Case Study of Adolescent Bulimia Nervosa Through the Stress-Vulnerability Model

Author(s) Ms. Shreya Dhil
Country India
Abstract Eating disorders are a group of psychological disorders of special interest to young people, involving serious disturbances in eating behaviour together with intense concern about body weight and shape. This paper presents a case study of A.K., a sixteen-year-old female student who developed bulimia nervosa at the age of fourteen following repeated teasing and criticism about her weight. The case is analysed through the diathesis-stress model: a predisposed adolescent was exposed to pathogenic stressors at a developmental stage when body image is central to self-esteem, while behavioural reinforcement, in the form of relief experienced after purging, maintained the binge-purge cycle for nearly two years. The client was treated with Cognitive Behaviour Therapy over sixteen weekly sessions, following its bio-psychosocial approach: relaxation procedures at the biological level, behavioural techniques and cognitive restructuring at the psychological level, and environmental manipulations at the social level. The binge-purge episodes ceased by the final month of therapy, with marked improvement in mood, concentration, and academic performance. The case underlines that eating disorders are treatable illnesses, and highlights the importance of early identification, family support, and the therapeutic relationship in recovery.
Keywords bulimia nervosa, eating disorders, adolescence, diathesis-stress model, body image, binge-purge cycle, reinforcement, cognitive behaviour therapy, case study, psychology, psychological disorders
Field Sociology > Philosophy / Psychology / Religion
Published In Volume 8, Issue 4, July-August 2026
Published On 2026-07-12
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E-ISSN 2582-2160
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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