Tightness in the armpit after breast cancer surgery can be good for 1 to 2 months, the exact time may vary slightly depending on the patient. When breast cancer surgery is performed, if there is axillary lymph node metastasis, axillary lymph node dissection is needed, and trauma occurs in the axilla, at this time, tissue hyperplasia, axillary vein embolism, etc., and these causes lead to tightness in the axilla. At this time, the wound usually heals in 7 to 10 days, and the tightness of the armpit may take 1 to 2 months to heal. The specific recovery time of tightness in the armpit after breast cancer surgery is also related to the local condition of the wound, if the wound is large, the recovery time will be prolonged accordingly, and if the local infection and fluid accumulation occur, the recovery time will also be delayed. After breast cancer surgery, patients need to pay attention to keep the wound clean and dry, and observe the wound for infection, bleeding, etc. If there are any uncomfortable symptoms, they should inform the doctor in time, and take care of it under the doctor’s guidance.