This report provides a comprehensive comparison of the psychosocial and biochemical models of health and illness within the context of health and social care. It begins by introducing the Health Belief Model as a key psychological framework and defines psychosocial health as encompassing mental, emotional, social, and spiritual well-being, contrasting it with the biomedical model's focus on physical and biological aspects. The report delves into the psychosocial model, emphasizing the interplay of biological, psychological, and social factors in health and illness, highlighting its applications across various healthcare fields, and the impact of environmental and genetic factors on mental health. It contrasts this with the biomedical model, which primarily focuses on biological factors and excludes social and psychological influences, detailing its applications in diagnosis, treatment, and care. The report also discusses the advantages and limitations of both models, concluding with the crucial role of integrating both psychosocial and biochemical approaches for optimal patient well-being, acknowledging the limitations of each model in various medical conditions.