Depression is a mood disorder characterized by persistent feelings of sadness, hopelessness, and a lack of interest in activities once enjoyed. It can affect every aspect of life, including sleep, appetite, energy, and concentration. Symptoms may also include feelings of worthlessness, irritability, and thoughts of death or suicide. Depression can result from a combination of genetic, biological, environmental, and psychological factors. While it can be debilitating, depression is treatable with the right support. Therapy, medication, lifestyle changes, and social support can help individuals manage symptoms, regain emotional balance, and improve their quality of life. Early intervention is key to recovery.