Breast cancer is a type of cancer that mostly affects women, although it can affect men as well. It starts in the cells that make up the breast tissue. It happens when aberrant cells in the breast proliferate out of control, creating a tumor that has the potential to spread to other body areas. A breast lump, alterations in breast form, skin dimpling, or nipple discharge are possible symptoms. Effective therapy depends on early detection achieved by screening and self-examinations. Both sexes should be aware of the dangers and seek medical attention if any symptoms appear.