There are two main possibilities: first, cystic hyperplasia of the breast, which occurs in women of childbearing age between 30 and 50 years old, mostly related to endocrine hormone disorders, manifested as breast pain with nodule-like changes of breast hyperplasia, the pain is mostly needle-like pain and increases before menstruation, and can be relieved after menstruation. When the pain is obvious, you can take Xiaojin Pill or Progressive San for symptomatic treatment, the symptoms can be relieved, if there is persistent breast pain or nodule progressive enlargement, you should suspect the possibility of nodule malignancy, should be timely surgery to remove treatment. Second, acute mastitis, mostly in lactating women, is an acute purulent infection of the breast, in the early stages of infection, there is only needle-like pain in the breast, may be accompanied by local redness and swelling of the breast, when the infection spreads further, there will be breast abscess, and fluctuating lumps are palpated in the breast, often requiring surgical treatment.