Breast abnormalities Women with dense and firm breasts are prone to breast cancer. In addition, abnormally large breasts during adolescence, excessive breast fondling when they are underage, or filling the breasts with some inappropriate substances for breast reconstruction in order to keep the breasts plump and beautiful in appearance are also one of the causes of breast cancer. Peculiar body shape Women who are particularly obese above the waist, whose waist circumference is similar to their hips, or who are very thin before menopause. Mental trauma According to the survey, introvert personality and unhappy early life are important factors leading to cancer. Dietary Preference Studies have shown that a high-fat, low-fiber diet can increase the incidence of breast cancer by more than four times. Frequent alcohol consumption A young woman who drinks alcohol 3 to 6 times a week, each time based on 250 ml of beer or 185 ml of spirits, will increase her risk of breast cancer by 30% to 60% in the future. According to research, the risk of breast cancer for women who are not breastfeeding is more than 1.5 times greater than that for women who are breastfeeding, and the risk of breast cancer for women who have never given birth or who have given birth too late is 30% higher than that for women who have given birth. Family history of cancer It has been confirmed that a family history of cancer, especially if the parents and sisters have been breast cancer patients, is about 30% more likely to develop breast cancer than others. Benign breast diseases According to research, lesions such as cystic hyperplasia of the breast, simple hyperplasia of the breast, and fibroids of the breast may deteriorate into cancer.