Many women find lumps in their breasts by chance, but do not understand what causes them, which makes them very worried. A breast lump is usually a condition in which a lump grows inside the breast due to the different composition of the breast tissue. Breast lumps are the most common breast disorder, and numerous benign diseases also manifest themselves in the form of breast lumps, so it is most important to distinguish between benign and malignant breast lumps. A breast lump may be a symptom of which diseases Breast lumps are common clinical manifestations of breast diseases, a variety of diseases can be manifested as breast lumps, their characteristics vary, the following are several common diseases that can cause breast lumps: 1, breast hyperplasia: breast hyperplasia is generally accompanied by breast lumps, lumps irregular in shape, with the menstrual cycle to increase or decrease, mostly accompanied by breast swelling or tingling pain. 2, breast fibroids: breast fibroids are the most common benign tumors in young women, mostly painless masses, initially small, but growing faster. 3, mastitis: mastitis is prone to abscess-type breast lumps, which are usually painful, and the skin on the surface of the breast is also red and hot, with generalized fever. 4. Breast lipoma: Lipoma can occur in any structure with adipose tissue, but is most common on the surface of the body and in the breast. It mostly occurs in more obese female patients, and the age of onset is 30 to 50 years old. 5.Breast cancer: It is the most common malignant tumor. Early on, it is a painless single lump with fast growth rate, hard texture and not easy to push. Since there are benign and malignant breast lumps, women who find lumps, lumps, hard objects, hard lumps and other discomforts in their breasts must go to a professional breast specialist hospital in time to identify the cause and treat the disease. The breast lump without timely treatment may lead to malignant lesions, or it may just be an abscess formed by inflammation. 2, affect the patient’s normal life: easy irritability, anger, fear and other emotions, thus menstrual disorders, physical strength, frequent urination, affecting married life, etc.. 3, compression of the gland, affect breastfeeding: breast lumps continue to grow, will compress the mammary glands, resulting in poor lactation, can not be normal breastfeeding. 4, malignant lesions, mastectomy: malignant breast diseases often appear in the form of painless lumps in the early stages, but because patients do not pay attention to them and do not go to the examination and treatment in time, the deterioration is accelerated, and finally the breast has to be removed, bringing endless physical and mental harm to patients. Because breast lumps do not disappear on their own, they need to be treated in a timely manner, but drug treatment is long and slow, often delaying the condition. Without treatment or improper treatment, the lump can still grow slowly, and over time, there is the possibility of becoming malignant, which is difficult to treat and can be life-threatening in serious cases. Ultrasound diagnosis has become one of the preferred methods for non-invasive breast examination because of its simplicity and non-invasiveness. Clinically, ultrasound examination is mainly used to check lobular hyperplasia, inflammation, cysts, fibroids and mammary tumors, especially in identifying the benignity and malignancy of breast lumps, detecting early breast cancer and checking whether there are enlarged lymph nodes in the axilla and trivium, which can provide a reliable basis for clinical diagnosis and treatment. It can provide a reliable basis for clinical diagnosis and treatment. X-ray mammography is one of the best methods to diagnose breast tumors. Because of its visualization, objective comparability, and long-term presence, mammography is not only beneficial to the diagnosis of breast diseases, but also to the follow-up, clinical research, and comprehensive evaluation before and after the disease process, and is indeed an imaging modality with the highest accuracy rate for preoperative diagnosis of breast diseases.