Under normal circumstances, before the development of breast, touch the round hard lump in the breast, with the development of puberty, the mammary glands gradually increase in size, and become more pliable breast tissue, the hard lump is symmetrical on both sides of the appearance of the consideration of the problem is not big, it should be normal breast tissue. If the hard lump is found in one side of the breast, it is considered to be a breast fibroadenoma, with smooth edges, round or round-like shape, good mobility, slow growth, and no uncomfortable symptoms, so you can go to a regular hospital and do ultrasound to confirm the diagnosis. Adult women find hard lumps in the breast, can be seen in the breast cystic hyperplasia, is due to hormonal imbalance in the body, resulting in the expansion of the breast ducts, caused by excessive proliferation of the breast, accompanied by lumps at the beginning of menstruation, after the end of menstruation, the obvious improvement, no matter which case, it is recommended that we first go to the hospital to consult the doctor, check to confirm the diagnosis.