The formation of oedema is seen in the following diseases: the first one is caused by malignant tumors, especially in patients who are in an advanced stage and are in a state of cachexia depletion, which causes edema of tissue cells and the patient will show local swelling. In this case, if economic conditions allow, intravenous supplementation of human albumin as well as plasma and the application of diuretics can reduce the swelling of soft tissues. The second type is common venous thrombosis of the limb, which leads to distal venous return obstruction and swelling, and should be treated with anticoagulation, expectoration, and, if necessary, thrombolysis, and elevation of the affected limb to prevent the complications of severe fatal pulmonary embolism. The third type is pulmonary stasis or body circulation stasis due to cardiac insufficiency and edema of the distal tissues of the limb, in which case symptomatic treatment such as diuretics should be given along with active correction of cardiac function. There is also renal insufficiency, which can also lead to disorders of water and sodium metabolism and edema of the limbs.