If you have a hard lump in your breast, you can take the following measures: 1. Go to the general surgery department or breast surgery department for clarification as soon as possible, usually you need to check breast ultrasound, mammogram, breast MRI, etc. Sometimes you also need to perform a puncture biopsy or excisional biopsy of the lump to clarify the nature. 2. If it is caused by malignant tumor, radical resection of the tumor and lymph node dissection are needed, and chemotherapy, targeted drug therapy, endocrine therapy, radiotherapy, and Chinese medicine treatment may be needed at a later stage. During the treatment period, fresh fruits and green vegetables and low-fat high quality protein can be consumed appropriately.