The time it takes for breast enlargement to become cancerous cannot be determined, and in some cases it may take more than 10 years. Breast enlargement occurs in pre-menopausal women, and its occurrence is related to the level of estrogen in the patient’s body. Women with high levels of estrogen are more likely to develop breast enlargement, while post-menopausal women’s chances of developing breast enlargement are significantly reduced. Breast hyperplasia is not directly related to cancer, although its possibility exists, the chance of cancer is small, only moderate to severe atypical hyperplasia has the potential to become cancerous. Moreover, the time is variable. Breast hyperplasia occurs in young women, malignant tumors occur more often in older people, breast hyperplasia appears cancerous most often occurs in the 40-odd years of age of non-menopausal middle-aged women, if the young people suffer from breast hyperplasia, then the process may take more than 10 years, but it is not absolute.