How does cancer occurs

Cancer occurs when the process of cell division becomes uncontrollable. Our genes control the division of body cells. The body is made up of different cells, due to changes in the body, these cells keep changing.

When these cells grow uncontrollably and spread throughout the body, then it gives trouble to other parts of the body. Because of which a tumor or tumor of cells is formed on those parts which is called cancer and this tumor is the most deadly which keeps on growing.