Misconceptions are the main culprit of delayed treatment. Breast cancer is becoming more and more common, but whether people know enough about breast cancer is still not enough. In clinical practice, when many patients with mid- to late-stage breast cancer are asked why they delayed to seek treatment until now, their answers often make doctors “regret and feel sad”. It is these misconceptions that delay the disease and miss the best time for treatment. Myth 1: Shyness to talk about it: On the one hand, young breast cancer is rampant, but on the other hand, young women are shy to talk about it. Especially for teenage girls, they are often too shy to tell their parents when their breasts are abnormally enlarged, thus delaying the consultation. Experts say with regret: “It is so painful to have breast cancer at such a young age and to have surgery to remove it. Myth 2: Self-medication: Some young women do not go to the hospital even if they know they have a lump in their breast, and they dare not go to the oncology hospital because they are afraid of hearing the word “tumor”. They either ignore it or seek the so-called “anti-cancer prescriptions” for self-governance, which results in advanced stage before they have to go to hospital for treatment. In fact, surgery is the first choice for breast cancer treatment, but if the treatment is delayed until late stage and the chance of surgery is lost, the cure rate is very low. Misconception 3, “half-barrel” knowledge of tumor: Some patients only know that benign lumps can be moved and immovable lumps are malignant tumors. They do not know that early malignant tumor lumps also have a certain degree of mobility, but only when they develop to a certain degree will they become hard. The actual fact is that some people think that their lumps are “benign” and do not seek medical attention because they think they are breast growths. When the lumps develop into “hard” then it is too late to treat them.