What Can Cause Breast Cancer?

There are number of risk factors that increase breast cancer. Certain risk factors, such as age, genetics , environmental factor , life style, Hormones change . 1. Breast cancer is uncommon in women younger than 35, with the exception of those who have a family history of the disease.2.The risk of breast cancer is about two times higher among women who have a first-degree relative (mother, sister, or daughter) with this disease.3.Breast cancer risk is increased in women with the longest known exposures to sex hormones, particularly estrogen 4. More exposed to toxin chemicals ,Radiation & pollination.5.overweight may contribute to risky estrogen exposure in such individuals.6.The risk of breast cancer is increased among women who drink,High consumption of alcohol increased the level of estrogen in the blood.

Apart from the above mentioned causes, another cause can be late child bearing or also known as Nullyparity. Also hormone replacement therapy might cause breast cancer.

Certain changes in DNA can cause normal breast cells to become cancer. DNA is the chemical in each of our cells that makes up our genes -- the instructions for how our cells work. Some inherited DNA changes (mutations) can increase the risk for developing cancer and cause the cancers that run in some families. For instance, BRCA1 and BRCA2 are tumor suppressor genes -- they keep cancer tumors from forming. When they are changed (mutated), they no longer cause cells to die at the right time, and cancer is more likely to develop.

But most breast cancer DNA changes happen in single breast cells during a woman's life rather than having been inherited. So far, the causes of most of the DNA mutations that could lead to breast cancer are not known.