Breast pain after menstruation should not be treated with self-medication, but should be treated in a timely manner by visiting a hospital’s Nail and Breast Surgery Department to find out the cause of the pain. Generally speaking, postmenstrual breast pain is usually considered as cystic hyperplasia of the breast, usually due to the imbalance of the ratio of estrogen and progesterone, and the pain is often cyclical. Single or multiple nodules of varying size and firm texture may be palpable in one or both breasts. Usually, medications such as Xiaojin Pills can be taken under doctor’s supervision after diagnosis. In addition to mastitis, trauma, breast cancer and intercostal neuralgia and other diseases need to be considered, so it is recommended that patients go to a regular hospital in a timely manner to find out the cause of the treatment as prescribed by the doctor, the use of drugs should be under the guidance of the doctor, do not take medication without authorization, so as not to cause serious consequences.