Mental stress is a natural response to challenges and demands in life. It occurs when the mind perceives pressure or threats, triggering emotional, physical, and psychological reactions. While short-term stress can be beneficial by enhancing focus and motivation, prolonged or excessive stress can negatively impact mental and physical health. Common causes include work pressure, personal relationships, financial issues, and major life changes. Managing stress through healthy coping mechanisms such as relaxation techniques, exercise, and social support is essential for overall well-being.