Many patients often ask their doctors why they have breast pain. In fact, breast pain is very common, and about 60% or more of patients come to the clinic mainly for breast pain. In fact, breast pain in general is related to endocrine disorders in the body, changes in hormone levels and incomplete breast enlargement reduction. The estrogen and progesterone hormones in women’s bodies change with the menstrual cycle, and the hormone levels reach a peak before menstruation, making the epithelial cells of the breast glands and ducts appear to proliferate, and the proliferating epithelial cells then revert after the period. If the hormone levels in the body are disturbed, or if the local breast tissue is too sensitive to hormones, over time, this can cause hyperplasia of the breast parenchyma and the formation of nodules or lumps. Breast pain is mainly associated with menstruation, fatigue, and emotions, but some patients have no obvious associated factors. The severity of breast pain also does not necessarily correlate with the degree of breast enlargement. Mild breast pain, especially if it appears before menstruation and disappears afterwards, usually does not need to be treated mainly by controlling mood swings, abstaining from foods and medications containing hormonal ingredients, and controlling factors such as fire. If the pain is severe, patients need to be examined, and if other causes of pain outside the breast are excluded, they can be treated with certain medications. However, the treatment process usually takes at least 3 months. It is wrong for many patients to stop taking medication after a week of feeling ineffective.