What Are the Causes of Breast Cancer?


I’m afraid of getting breast cancer. I’d like to know the causes so that I can do something to prevent.


It is impossible to pinpoint an exact cause of breast cancer. Once a cell’s DNA is damaged and turns abnormal, breast cancer occurs. Nowadays, we still can’t name the exact causes, but a series of risk factors have been found out.

  • Increasing age. Generally, women over 50 are more possible to have breast cancer.
  • Family history of breast cancer. Two genes, BRCA1 and BRCA2, have been identified to responsible for some familial breast cancer.
  • Personal history of breast cancer. Women who previously have breast or ovary cancer or benign breast lumps are more likely to have breast cancer.
  • Races. African-American women are more likely to develop breast cancer before menopause.
  • Hormones. Estrogen is one hormone that can lead to breast cancer. Exposure to it will increase the risk of developing breast cancer.
  • Period at a younger age.
  • Menopause at an older age.
  • First child at an older age.
  • No pregnancy.
  • Radiation exposure to the chest
  • Lifestyle. Obesity and diet.


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* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.