A mental disorder is a condition that affects a person's thinking, feeling, behavior, or mood. These disorders can disrupt daily life and impact relationships, work, and overall well-being. Common types include depression, anxiety disorders, and bipolar disorder. Mental disorders can arise from a combination of genetic, biological, environmental, and psychological factors. Treatment options often include therapy, medication, or a combination of both, aimed at helping individuals manage their symptoms and improve their quality of life. Early diagnosis and intervention can lead to better outcomes.