Where does cancer come from?

Cancer is a complex disease that can be caused by a variety of factors, including genetic mutations, environmental exposures, and lifestyle choices. The most common genetic mutations that lead to cancer are mutations in the genes that regulate cell growth and division. These mutations can cause cells to divide too quickly or to not die when they should, which can lead to tumors. Some of the environmental exposures that can lead to cancer include radiation, asbestos, and certain chemicals. Smoking, alcohol consumption, and obesity are also major risk factors for cancer.