Cancer is a disease that occurs when cells in the body grow uncontrollably. Normally, our cells divide and die in a regulated way, but cancer cells ignore these signals. This can lead to the formation of tumors, which are lumps of cancerous cells. There are many types of cancer, such as breast cancer, lung cancer, and prostate cancer, each affecting different parts of the body. The causes of cancer can vary widely and may include factors like genetics, smoking, and exposure to certain chemicals. Early detection through screenings and regular check-ups can improve treatment outcomes. Treatments for cancer often involve surgery, radiation, and chemotherapy, which aim to remove or kill cancer cells.