Mental health is the state when a person is functioning at a satisfactory level of emotional and behavioral adjustment. It can also be characterized by the absence of any mental illness. As per positive psychology, mental health includes an individual's ability to enjoy life, efforts to achieve psychological resilience and to create a balance between life activities. Mental health also includes subjective well-being, perceived self-efficacy, autonomy, competence, inter-generational dependence, etc. It also provides the ability to adapt, change and cope with hardship. Mental illness is caused by depression, anxiety, loneliness, stress, death of loved ones, etc. Treatments of mental illnesses include pharmacotherapy, psychotherapy, meditation, etc. This book covers in detail some existent theories and innovative concepts revolving around mental health. The topics included herein on mental health are of utmost significance and bound to provide incredible insights to readers. This book will serve as a reference to a broad spectrum of readers.