Bipolar

affective disorder (BD) is a chronic psychiatric condition

characterized by recurrent episodes of depression, mania, or

hypomania. Its course significantly reduces quality of life and

increases suicide risk. The coexistence of obsessive-compulsive

disorder exacerbates anxiety symptoms and complicates both diagnosis

and treatment. The aim of this study was to present a case

of a female patient hospitalized due to BD with comorbid

obsessive-compulsive disorder (OCD) and to develop a nursing

care plan based on the International Classification for Nursing

Practice (ICNP). The research material included medical records

and nursing observations. The 48-year-old patient demonstrated

severe depressive and compulsive symptoms, including avoidance of

meals and compulsive handwashing, which resulted in self-care

deficits and weight loss. The individualized care plan focused

on safety monitoring, emotional support, psychoeducation, sleep

hygiene, and activation. Hospitalization led to mood improvement,

anxiety reduction, and greater patient engagement in therapy. This

case highlights the crucial role of psychiatric nurses in

interdisciplinary care.