The hard lumps around the edges after breast-conserving surgery may be related to scarring, postoperative hematoma, inflammation and other reasons. 1. Scarring: Scar proliferation at the wound site after surgery, which will be transformed slowly over time. 2. Post-operative hematoma: after breast-conserving surgery may lead to local hematoma in the breast tissue, so it may feel harder, and generally may be gradually absorbed with the body’s metabolism. 3. Inflammation: Inflammatory lumps appear due to infection and inflammation in the wound area caused by lack of attention to hygiene and other reasons. There may be other reasons for the hard lumps around the edge after breast conservation surgery, so it is recommended that you go to the hospital in time to get a clear picture of the cause of the disease and then treat it.