A hard lump on the edge of the breast is considered to be a tumor in the breast, commonly known as fibroadenoma, which is a benign tumor of the breast with clear borders and good mobility, round or round-like in shape. If the tumor is relatively small, it can be observed for a period of time with follow-up, and if it grows slowly, it can be operated without surgery. Acute lymph node inflammation with pain, if it is located at the outer edge of the breast, it is considered to be cystic hyperplasia of the breast, try to go to a regular hospital to let the doctor check and diagnose.