Post-breast cancer arm edema mainly refers to the edema of upper limbs after surgery, which can be treated with general treatment and medication under doctor’s guidance. 1. General treatment: the common cause of arm edema is still the blockage of lymphatic vessels and the obstacle of lymphatic fluid return. It is necessary for the patient to lift the affected limb to promote the lymphatic fluid return, and can carry out functional exercises for the upper limb, and pressure therapy to promote the lymphatic fluid return. At the same time, infrared physiotherapy and other physical therapy measures can be carried out for the surgical area, especially the axillary area. Through physical therapy, local blood circulation can be improved, local scar contracture can be improved, the pressure on lymphatic vessels can be reduced, the smoothness of lymphatic vessels can be restored, and the edema of upper limbs can be improved. 2. Drug treatment: breast cancer patients’ surgery is mainly radical surgery, and the surgical trauma is more obvious, which requires patients to have regular anti-inflammatory, hemostatic and analgesic treatment under the guidance of doctors after surgery. After the disease is stabilized, for the edema of upper limbs, patients can take medicines to activate blood circulation and remove blood stasis, such as Mai Zhi Ling, Herba Mucilaginis Flowing Leaf, Horse chestnut Saponin Sodium Tablet, etc., to improve the local blood circulation and improve the edema of upper limbs. Generally speaking, with the gradual recovery of the patient’s body after surgery, the edema of the upper limbs will slowly improve and subside.