Breast enlargement after breastfeeding can be treated symptomatically with analgesic medication, hormonal and other medications, regular checkups, and surgery if necessary. Breast enlargement is mostly caused by the imbalance of estrogen and progesterone ratio, there may be hormonal imbalance in the body after returning breast milk, which stimulates the overgrowth of breast parenchyma and produces lumps and swelling and pain symptoms. The main symptomatic treatment for breast enlargement after breastfeeding, such as hot compresses to reduce swelling and pain, taking Chinese medicine to reduce pain. For those with severe symptoms, you can take Tamoxifen, as well as vitamins A and E and other medications. Medications should be applied under the guidance of a doctor. It is generally recommended that patients with localized lumps should be re-examined five days after menstruation, and if the lumps shrink and subside, observation and symptomatic treatment can be continued. If the lumps do not subside significantly, suspected malignant foci need to carry out pathological biopsy, biopsy for malignant should be radical surgery, as well as chemotherapy, endocrine therapy, and so on. It is recommended that the patient should consult the doctor in time and follow the doctor’s instructions for further examination and treatment.