The cause of breast gland thickening is cystic hyperplasia of the breast, which is also a description of cystic hyperplasia of the breast found on ultrasound examination. If there is breast swelling and tingling discomfort along with the menstrual cycle and there is a hard lump in the breast, it is considered to be cystic hyperplasia of the breast and does not require special treatment. If the painful symptoms are severe, you can take oral medication to dredge the liver and Qi, and treat the symptoms, such as prolotherapy pills. If the symptoms of breast thickening can be relieved or disappear after the menstrual cycle, the problem is considered minor. If the thickening or hard lump persists, further examination is needed to exclude malignant tumors. The mere description of breast gland thickening is not diagnostic of the disease. You can follow up and observe for a period of time and do needle aspiration biopsy if necessary to confirm the diagnosis of the disease and then treat it symptomatically.