The most common clinical condition for left breast pain is breast hyperplasia, which includes physiologic and pathologic hyperplasia. Physiological hyperplasia is due to the large secretion of estrogen before the menstrual cycle, resulting in stimulation of mammary gland hyperplasia. At this time, the patient will appear localized breast thickening often without obvious nodule formation, when the end of the menstrual cycle symptoms can be relieved breast thickening will also be relieved. Pathological hyperplasia is mainly due to endocrine disorders, long-term excessive secretion of estrogen causes mammary gland hyperplasia, mainly ductal and follicular hyperplasia. Progesterone secretion is low to reduce the protective function of the mammary glands, thus leading to the emergence of the disease. Patients need to regulate their psychological state to help alleviate endocrine disorders, which can also alleviate the symptoms of breast hyperplasia. If the symptoms are still obvious, it is recommended to give oral medication, which can often achieve better clinical results.