Mental stress is a pervasive phenomenon in modern society, with profound implications for human health and well-being. This comprehensive review examines the intricate pathophysiology of mental stress and explores various remedial approaches. We discuss the complex biological mechanisms underlying the stress response, including the roles of the hypothalamic-pituitary-adrenal (HPA) axis, the sympathetic nervous system, and the emerging field of psychoneuroimmunology. The review delves into the neurobiological changes associated with chronic stress, such as alterations in brain structure and function, synaptic plasticity, and neurotransmitter systems. We explore the cascading effects of chronic stress on various bodily systems, including the cardiovascular, immune, and metabolic systems. The psychological and behavioral manifestations of stress are examined, along with its role in the development of various mental and physical disorders. Finally, we evaluate a range of remedies, including novel pharmacological interventions, evidence-based psychological therapies, and lifestyle modifications. This review aims to provide a holistic understanding of mental stress pathophysiology and its management, highlighting recent advances, current challenges, and promising areas for future research and clinical application.