After the small incision top lumpectomy, the doctor told the patient to come to the hospital in two days to “unpack”. You can use a support under the elbow to lean on. Why can’t I move? Because the fresh post-operative wound, small blood vessels are growing rapidly and the new granulation tissue will bleed when exposed to external force. If the wound is propped open, the hematoma will aggravate the adjacent bleeding and individual tension hematoma will be formed. It is crucial to maintain the upper arm at a fixed angle without random movement as much as possible for a smooth postoperative recovery! Two months ago, a male patient who did not follow medical advice wrapped the wound at home in an improper way, resulting in a large axillary hematoma. Although this case recovered well after our emergency debridement, no delayed healing occurred. However, the consequences are much more serious when complicated by extensive skin necrosis and secondary infection. The risk can be minimized by doing what the doctor ordered.