The following ten types of people are known as the high-risk group of breast cancer and are prone to breast cancer: (1) People with family history of cancer: According to the data, it is confirmed that people with family history of cancer, especially their parents and sisters who have been breast cancer patients, are about 30% more likely to develop breast cancer than others. (2) People with abnormal menstruation and menopause: People who start their menstruation too early (before the age of 12), menopause too late (after the age of 55), and those with short menstruation especially less than 21 days are more likely to have breast cancer. (3) People with abnormal breasts: Women with dense breasts and firmer texture are more likely to develop breast cancer. In addition, abnormally enlarged breasts during adolescence, excessive fondling of breasts when they are underage, or filling the breasts with some inappropriate substances for mammoplasty in order to keep the breasts plump and beautiful in appearance are also among the causes of breast cancer. (4) People with special 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. (5) People with high work pressure, irregular life and mental trauma: According to the survey, introversion and unhappy early life are important factors leading to cancer. (6) People with high-fat diet preference: Research shows that high-fat and low-fiber diet can increase the incidence of breast cancer by more than 4 times. (7) Frequent drinkers: A young woman who drinks alcohol 3 to 6 times a week, each time based on 250ml of beer or 185ml of spirits, will have a 30% to 60% increased risk of breast cancer later in life. (8) Those who are not breastfeeding: According to research, the risk of breast cancer in women who are not breastfeeding is more than 1.5 times greater than that of breastfeeding women. (9) Those who are not breastfeeding or have never given birth or have given birth too late: Studies have shown that the risk of breast cancer in women who are not breastfeeding is more than 1.5 times greater than that of breastfeeding women; the risk of breast cancer in women who have never given birth is 30% higher than that of women who have given birth; the relative risk of breast cancer in women over 35 years of age who have had their first pregnancy is 3 to 4 times greater than that of women under 30 years of age who have had their first pregnancy. (10) People with certain benign breast diseases: According to research, lesions such as cystic hyperplasia of the breast, simple hyperplasia of the breast, and fibroadenoma of the breast may deteriorate into cancer.