How to prevent or reduce the lymphedema of the upper limb on the affected side after breast cancer patients’ operation To prevent or reduce the lymphedema of the upper limb, it is suggested as follows: don’t carry heavy things on your hand or shoulder, and don’t do the work that requires the muscles of your arm to make great efforts. When the muscles are exerted, a large amount of oxygen needs to be supplied to the muscles, which will lead to a large amount of blood flowing into the arm and increase the burden of blood and lymphatic circulation of the affected side of the upper limb. In normal times, you should still move your arm frequently, and you can also do some light housework or appropriate work. Try to place your arm in a position higher than your heart, for example, by using a few pillows to elevate your arm, but be careful to support the whole arm, not just the upper arm. If you need to carry your bag on your shoulder, do so on the shoulder that has not been operated on. Women who experience shoulder pain should avoid carrying a bag over the shoulder. If possible, keep your hands in the pockets of your blouse or skirt to relax the muscles in your shoulders and arms. Usually, the sleeve holes of the clothes should not be too tight, and the straps of the bra should not be so tight that they are embedded in the shoulder, and if necessary, the straps can be widened or a padding can be added. When wearing rings, bracelets, watches, should try to be more loose, do not let them embedded in the skin. Care should also be taken to avoid direct heat on the arms, such as hot baths, washing dishes in very hot water, prolonged ironing, and prolonged sunbathing. Attention should also be drawn to the fact that when the blood circulation in the arms is slowed down, a slight break in the skin on the arms, especially on the hands, such as a cut, a split, a burn, a thorn, etc., will be more difficult to heal, and a pair of work gloves may be worn, if necessary. If a small wound is sustained on the hand or arm, disinfecting measures should be taken in a timely manner, e.g., disinfecting with iodine solution. To avoid unnecessary wounds, blood tests, injections and fluids should usually be given on the non-operated side. In the area of the lymph nodes under the armpit, do not treat them with subcutaneous injections or needles. In other words, try not to inject medications into the upper extremities on the side where the surgery was performed, as this will increase the likelihood of edema in these areas. Also, to prevent the risk of edema, it is best to measure blood pressure on the non-operated side as well. As long as these measures are implemented consistently, satisfactory results will be achieved. However, the tendency to edema is still always present. With persistent correct exercise and proper attention to arm rest, 70 to 80% of edematous arms can be restored to their original condition. A further treatment is to wear an elastic bandage on the arm. Several medications to reduce edema should be used with caution because: (1) Diuretics should not be taken for long periods of time, as they increase the concentration of protein in intercellular tissues, which we do not want. (2) Ointments or topical medications recommended to treat lymphedema produce an instant cooling and cooling sensation, which makes you feel better. However, there will be no radical improvement in chronic arm edema. Finally, a few more points about arm edema: (1) After lymphedema develops in the arm, some adjustments need to be made to the daily life, and there is no reason to lose confidence. (2) Measures should be taken at the very beginning of lymphedema. (3) If you are sure that the edema is getting worse, you should consult a doctor immediately. Lymphedema of the affected limbs after breast cancer surgery is a very troublesome thing, for which there is no effective medicine or treatment, and medical science has now realized this problem. When some hospitals perform breast cancer surgery, they usually do not do axillary lymph node dissection if the biopsy of sentinel lymph nodes is negative. In addition, postoperative radiotherapy no longer irradiates the axillary area, and all these measures can prevent and reduce swelling of the upper limbs.