Breast cancer is a common malignancy that primarily affects women but can also occur in men. It arises from the uncontrolled growth of breast cells, often forming a lump or mass. Early detection through mammography and self-examination significantly increases the chances of successful treatment. Risk factors include genetic predisposition, hormonal influences, age, and lifestyle factors like diet and exercise. Treatment options depend on the type and stage of cancer and may involve surgery, radiation, chemotherapy, hormone therapy, or targeted therapy. Advances in personalized medicine have improved outcomes for many patients. Awareness and regular screenings are crucial for early intervention.