The aim of this study was to give a brief explanation about Breast Cancer, its causes, factors that cause breast cancer, diagnosis, treatment, etc. in India and in World. Also given a brief description of Cancer, and its types. Breast cancer is the most common female cancer in the world, Breast cancer incidence is rising all over the world, at different rates. Many clinical and genetic factors have been found to increase a woman’s risk of developing the disease. Current strategies to decrease a woman’s risk of developing breast cancer include primary prevention, such as avoiding tobacco, exogenous hormone use and excess exposure to ionizing radiation, maintaining a normal weight, exercise, breastfeeding, eating a healthy diet and minimizing alcohol intake. The objective of this study was too aware the women from various causes of breast cancer.