Cancer, often referred to as "The Big C," is a group of diseases characterized by the uncontrolled growth of abnormal cells in the body. These cells can invade nearby tissues and spread to other parts of the body through the bloodstream or lymphatic system. There are many types of cancer, including breast cancer, lung cancer, and prostate cancer, each with its own causes and risk factors. The exact cause of cancer is complex and can involve genetic, environmental, and lifestyle factors. Common risk factors include tobacco use, excessive alcohol consumption, and obesity. Early detection through screenings and awareness of symptoms can improve treatment outcomes, making it essential for individuals to stay informed about their health.