The side effect of fluid retention after chemotherapy, generally can be treated with diuretics, kidney-preserving drugs, can be combined with eating some foods that have diuretic effect, for chemotherapy drugs that easily lead to water-sodium retention generally can be applied some hormones to reduce water-sodium retention before use. 1. For limb edema caused by sodium retention after chemotherapy, furosemide, spironolactone and other diuretic drugs can be used for treatment. 2. For renal impairment caused by overloading of the kidneys due to sodium retention, some kidney-preserving drugs can be taken for treatment, such as Liufidihuang Pill. 3. Chemotherapeutic drugs such as docetaxel, which can easily lead to sodium retention, can be treated with hormonal drugs such as dexamethasone before use to prevent and reduce the occurrence of sodium retention. Drugs should be used under the guidance of a doctor, do not blindly use drugs, so as not to delay the condition.