Normal breasts have glands and fat inside, and when they are pinched, they may touch the glands inside, which may feel different from the surrounding soft tissues, and may appear as hard lumps, which is normal. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. When abnormal changes occur in breast enlargement, the gland will overgrow and produce nodules, accompanied by more obvious pain; 2, cysts: due to the blockage of the breast ducts, resulting in the accumulation of milk inflammation formed cysts, cysts progress pain, but also accompanied by redness, swelling, hard lumps fever and other symptoms; 3, nodules: smaller hard lumps in the breast is called breast nodules, benign nodules outline clear, can move, no adhesion with the skin, sometimes may be accompanied by swelling and pain. Sometimes it may be accompanied by breast swelling and pain. However, malignant nodules are unclear in outline, not easily movable, adherent to the skin, painless, but will be accompanied by complications such as nipple overflow or nipple indentation; 4, tumor: nodules will become tumors when they develop and increase in size. Benign tumor hard masses are smoother to touch and can be pushed. The masses grow more slowly and may not change significantly in size for a long time. Malignant tumors are harder to the touch, not smooth at the edges, not easy to push or even poorly demarcated at the edges, growing rapidly, and will also be accompanied by the enlargement of surrounding lymph nodes.