Cancers are a group of diseases characterized by the uncontrolled growth of abnormal cells in the body. These cells can form tumors, invade nearby tissues, and spread to other parts of the body through the bloodstream or lymphatic system. There are many types of cancers, including breast cancer, lung cancer, and skin cancer, each with its own causes and risk factors. Early detection and treatment are crucial for improving the chances of recovery. Common treatments include surgery, radiation therapy, and chemotherapy. Lifestyle choices, such as a healthy diet and regular exercise, can also help reduce the risk of developing cancer.