Breast cancer is a common malignant tumor in women. About 1.2 million women around the world suffer from breast cancer every year, and the incidence of breast cancer in China is also increasing year by year. However, due to the lack of awareness, there are often some misconceptions about breast cancer: Misconception 1: Only postpartum or middle-aged women need to start preventing breast cancer? The peak age of breast cancer incidence is between 40 and 60 years old. Many people think that breast cancer is a disease that is only highly prevalent in middle-aged and older women, but in fact, young women are at the same risk of breast cancer as older women. Recent studies have shown that the incidence of breast cancer among women in large cities is increasing year after year and is trending younger. In the tertiary prevention of breast cancer, the focus should be on early diagnosis and treatment, regular self-examinations, special physical examinations and medical examinations by specialists, especially for women with family history of breast cancer or those who are at high risk of breast cancer. Women over 35 years old should receive a mammogram every six months and a mammogram once a year. Myth 2: You only need to choose between ultrasound and mammography? Many people think that they only need to choose one of ultrasound or mammography for breast screening. Color ultrasound is non-invasive, fast, repeatable, and can accurately identify cystic and solid lesions with an accuracy of 96% to 100%, while color Doppler flow imaging can identify the benign and malignant nature of breast lumps, but color ultrasound cannot detect microcalcifications. Mammography can detect breast lumps that cannot be touched by doctors, especially for large breasts and fatty breasts, its diagnostic accuracy can be as high as 95%, and it is very sensitive and specific for malignant tumors with calcification foci. It is the first choice and the easiest and most reliable non-invasive test for the diagnosis of breast diseases. Therefore, these two examinations are complementary and irreplaceable to each other, and they are the two necessary examinations for breast health checkups. Myth 3: Breast pain is the precursor of breast cancer, so if the breast does not hurt, there is no need to worry? Many women think that breast cancer is mainly manifested by breast pain, so the first thing they worry about is whether they have breast cancer or not. In fact, the first common symptom of breast cancer is the discovery of painless lumps, while breast pain is often a common manifestation of breast enlargement. The pain of breast enlargement is usually cyclical breast pain, which can be accompanied by breast lumps and changes with menstrual cycle and emotions. However, regular breast checkups are necessary for early detection of breast lesions, and one should not assume that if the breast does not hurt, there is no need to worry about the occurrence of breast tumors.