Swelling of the arm after breast cancer surgery needs to be considered according to the degree of edema and accompanying symptoms. Usually, lymphatic channels are destroyed due to lymph node dissection during the surgery of breast cancer patients, and lymphatic reflux can be blocked after the surgery, resulting in edema of the arm. In order to relieve the edema of the arms, the treatment of lymphatic reflux obstruction should be carried out. In order to alleviate the phenomenon of arm edema after surgery, it is necessary to lift the upper limb upward, promoting local lymphatic reflux through the effect of gravity, which has the effect of reducing swelling and relieving pain. The use of low elastic bandage pressure bandage or wear medical elastic cuff, can improve the swelling of the upper limb, reduce fluid accumulation, reduce limb circumference and other purposes. However, it is necessary to pay attention to follow the doctor’s instructions according to the time to wear, to avoid too long to affect the blood supply, or too short a time to play a role in the effect. If the patient’s arm edema phenomenon is more serious, it is recommended to be diagnosed by a professional doctor, if necessary, pressure pumps can be used to promote the elimination of swelling. Surgical treatment is also available when necessary. Patients should actively cooperate with the doctor’s treatment, do not self-medication to avoid unnecessary adverse reactions.