If you have a hard lump in your breast during pregnancy, you need to consult a breast surgeon promptly and let a professional doctor do breast palpation to understand the size, texture and mobility of the lump to help determine its nature, and check the breast ultrasound if necessary to see if there is any abnormality. If there is no abnormality in the examination, pay attention to breast hygiene during pregnancy, scrub with warm water and do not squeeze your breasts. Due to changes in hormone levels and breast development, there will be slight swelling and discomfort during pregnancy, and if there is no abnormality in the ultrasound, no special treatment is needed, and wearing a suitable bra is fine. If the ultrasound indicates benign fibroids, no special treatment is needed during pregnancy, and they will be reviewed regularly after breastfeeding and weaning after childbirth, and surgically removed if necessary.