Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 0 0 2026 06 15 1 13 Lakshmi Dorai B B Department of Psychiatry, Vinayaka Mission's Kirupananda Variyar Medical College and Hospital, Vinayaka Mission's Research Foundation (Deemed to be University), Salem 636308, India. Alluri Swetha Reddy Department of Psychiatry, Vinayaka Mission's Kirupananda Variyar Medical College and Hospital, Vinayaka Mission's Research Foundation (Deemed to be University), Salem 636308, India. Mukesh B M Department of Psychiatry, Vinayaka Mission's Kirupananda Variyar Medical College and Hospital, Vinayaka Mission's Research Foundation (Deemed to be University), Salem 636308, India. Arbind Kumar Choudhary Department of Pharmacology, Government Erode Medical College and Hospital, Erode 638053, India. 2025 10 28 2026 05 25 Objective: Somatic-type delusional disorder is characterized by fixed false beliefs related to bodily changes or illness. This report describes an unusual early-onset case associated with significant functional decline and compares its features with previously published cases. Method: Clinical information was collected through psychiatric assessment, family interviews, physical and neurological examinations, laboratory investigations, and six months of follow-up. A narrative review of relevant English-language case reports published between 2003 and 2025 was also undertaken. Results: A 22-year-old woman developed a persistent belief that self-inflicted cuts on her feet had permanently altered her joints and skin. Despite repeated reassurance and normal medical findings, she remained convinced of the perceived deformity. The condition was associated with depressed mood, social isolation, poor self-care, reduced food intake, and academic impairment. Investigations did not identify an underlying medical cause. Treatment with olanzapine, psychoeducation, supportive psychotherapy, and family counselling resulted in gradual improvement. During follow-up, delusional conviction decreased substantially, accompanied by better self-care, social interaction, and academic functioning. Review of the literature indicated that severe impairment and early onset are relatively uncommon in somatic-type delusional disorder. Conclusion: Early-onset somatic delusions can lead to marked psychosocial dysfunction and may differ from the traditionally described pattern of preserved functioning. Comprehensive assessment, ongoing diagnostic review, and combined pharmacological and psychosocial interventions are important for achieving favorable outcomes. https://ijps.tums.ac.ir/index.php/ijps/article/view/4452 https://ijps.tums.ac.ir/index.php/ijps/article/download/4452/1342