If you can touch a bean-sized thing in the breast, you can consider the following situations: 1) Breast fibroadenoma, this is a benign tumor, which is caused by the sensitivity of fibroblasts to estrogen, and this kind of tumor grows slowly, with a clear and smooth border and good mobility, and the treatment is surgical excision. 2) Breast cysts, breast cysts are mostly caused by the breast accumulation of breast milk or the expansion of ducts of the breast caused by the hyperplasia of breast, and this kind of situation also belongs to benign tumor. Cysts formed by dilation of ducts are also benign tumors and can be followed up for observation.3. Enlarged lymph nodes in the breast, when there is inflammation and infection in the breast, it will lead to enlarged lymph nodes in the breast, and at the same time, there will be pain in the local area.4. Breast cancer, this is a symptom of mutation of normal cells in the breast to form cancerous cells, which is rapid in growth and has unclear boundaries, so it is necessary to consult a doctor for treatment in a timely manner. No matter which situation it belongs to, it is recommended to go to the hospital for examination first.