The hematoma after breast surgery should be determined first whether it is an active bleeding or a resting hematoma. If it is an active bleeding to open the probe, find the bleeding point and ligate to stop the bleeding, if it is a local hematoma formed after surgery, the choice of method needs to be based on the size and extent of the hematoma. If the hematoma is small, local hot compresses can be applied with the aim of speeding up the absorption of the hematoma and closely monitoring the size of the hematoma to ensure that it is not increasing, and usually the hematoma can be absorbed on its own in about a week. After contraindications are ruled out, the treatment can be combined with drugs that activate blood circulation and remove blood stasis for better results. If the hematoma is so large that it absorbs on its own, puncture aspiration is often chosen to draw out the hematoma, and the operating physician pays attention to the choice of needle size. If the effect of puncture and aspiration is not obvious or the location is too deep for complete removal, incision and drainage can be performed by choosing a gravity low position, cutting along the skin line, bluntly separating up to the hematoma site, establishing a drainage channel, and paying attention to local disinfection during drainage to prevent retrograde infection.