Finding a lump growing in the breast is the most common symptom of breast disease, and many young women are very nervous when they feel a lump in their breast. In fact, for breast lumps, the most important thing is to distinguish between their benign and malignant nature. It should be said that the vast majority of breast lumps in young women are benign, such as mastopathy, breast fibroadenoma, plasma cell mastitis, breast cysts, etc. The proportion of malignant tumors is low. The common clinical breast lumps are as follows: 1, proliferative breast lumps: often called lobular hyperplasia, mostly accompanied by premenstrual breast pain, after the menstrual period, the pain can be reduced, the lumps can also be reduced, the lumps are often multiple, soft or firm texture, local can have mild to moderate tenderness, after symptomatic treatment with drugs can have varying degrees of improvement. 2.Benign breast tumor: The most common one is fibroadenoma, which occurs in young women aged 20-30 years old, and has a great relationship with the high hormone level of young women. The physical examination is often a smooth, movable lump with clear borders, and the texture is tougher than normal breast tissue, which can be in the shape of “marbles” or “lobes”. The mass can be small, but it can also be large, and those that exceed 7 cm are called giant fibroadenomas. Fibroadenomas can be multiple in 20% of patients. Generally, such lumps over 1cm can be removed through open surgery or minimally invasive surgery. 3, inflammatory breast lumps: often occurs during lactation, is one of the symptoms of acute mastitis, accompanied by relatively severe breast pain, lumps are also accompanied by significant local inflammatory reactions such as redness, swelling, heat and pain, lumps can be septic and broken, after anti-inflammatory treatment and local drainage, inflammation subsides, lumps can disappear. Inflammatory breast lumps that occur during the non-lactation period may appear as abscesses next to the areola, mostly plasma cell mastitis. 4.Breast cancer: Of course, young women also have the possibility of developing breast cancer, especially among those with a family history of breast or ovarian cancer and genetic mutations. The symptoms of breast lumps caused by breast cancer are similar to those of general breast cancer and may gradually develop into nipple depression, breast skin depression, orange peel-like changes and enlargement of axillary lymph and other symptoms. If you find any of these symptoms, you should go to the hospital as soon as possible. For young women, breast ultrasound, mammogram and breast MRI are all options to check for breast lumps. It should be emphasized that all breast lumps require a final definitive diagnosis only through histological biopsy, such as puncture and surgical excision, can the nature of the breast lump be truly determined. Therefore, when you find a breast lump or feel breast discomfort, you should go to a regular hospital’s breast specialist clinic as soon as possible to identify the nature of the lump in time to take appropriate treatment measures.