Lumps in the breast are seen for the following reasons: First, for middle-aged and older patients, malignant tumors occur very often and can manifest as painless swellings, also combined with bloody nipple overflow, while the evolution of the tumor can also manifest as abnormal changes in the skin of the breast and malignant tumors are prone to axillary lymph node metastases. Secondly, patients with mammary fibroid tumors may also manifest as a mass in the gland with a soft texture, similar to the feeling of a rubber ball, smooth surface and good mobility, which appears very often in young people and can occur singly or in multiples, and if it does not improve after enlargement, surgical removal can also be chosen. Thirdly, inflammatory masses of the breast or local injuries after trauma can also be manifested as local lumps.