In today’s world of “cancer”, if a woman feels a hard lump in her breast, she will be scared if there is cancer. Although breast cancer is mainly manifested by breast lumps, not all hard lumps felt in the breast are breast cancer, most of them are benign. There are lobular hyperplasia lumps, breast fibroid lumps, breast hyperplasia lumps, intraductal papilloma, breast cancer lumps and so on. The differences between them are as follows: I. Breast hyperplasia lumps, lumps of different sizes, piece-like are common, the border is not obvious, the texture is medium and slightly hard, with tenderness, the lumps become bigger and harder before menstruation, and shrink and soften after menstruation. Second, lobular hyperplasia lumps, more on both sides, but also single, lumps of different sizes, painful to touch, premenstrual breast swelling, lump size will change with the menstrual cycle, the onset of more young and middle-aged people. Breast cyst, it is liquid inside, the substance of the cyst is a blister, it can be a simple cyst or a cumulative breast cyst (milk), generally rely on clinical palpation can be diagnosed, cystic mass is generally round or oval, palpation texture tough, elastic, ultrasound suggests: no echo. Breast fibroids: They occur in young women around 20 years of age and are painless lumps, unilateral or bilateral, and the size of the fibroids is not related to the menstrual cycle. They are generally slow growing, round or oval in shape, with good mobility and a sliding sensation on palpation, and often have an envelope when the specimen is cut open. V. Intraductal papilloma, which is usually accompanied by nipple overflow and can appear as a relatively hard breast lump in larger cases. Breast cancer lumps are hard, unilateral, poorly mobile, adherent to the skin, develop rapidly over time, and are not related to menstrual emotions. In the early stage, most of the lumps are painless, growing for months or even years without any pain, which is one of the reasons why breast cancer is diagnosed late. In the advanced stage of breast cancer, in addition to breast lumps, there are also enlarged lymph nodes in the ipsilateral armpit. If a woman feels a hard lump in her breast, she needs to find out the nature of it as soon as possible. If you are worried about the tendency of cancer, ultrasound examination of breast is preferred, and mammogram and MRI can also be done. If the lump is cancerous, it can be detected and treated at an early stage. If the diagnosis is not cancer, you can rest assured.