Cancers are a group of diseases where cells in the body grow uncontrollably. Normally, our cells divide and grow in a regulated way, but cancer cells ignore these rules. This can lead to the formation of lumps or tumors, which can be benign (non-cancerous) or malignant (cancerous). When malignant tumors spread to other parts of the body, it can be very serious. There are many types of cancers, such as breast cancer, lung cancer, and skin cancer. Each type can affect different parts of the body and may require different treatments. Early detection and treatment are crucial for improving the chances of recovery.