Swelling of the legs in heart failure is not a precursor to death, and the symptoms can be relieved by systematic treatment. Heart failure, mainly right heart failure can appear lower limb edema, is due to the right heart failure caused by blood stasis in the circulation, venous pressure increased and led to the common symptoms of heart failure, not a precursor to death. Right heart failure causes edema in the legs in addition to may cause nausea, abdominal distension, dyspnea and other symptoms. The swelling of the legs in heart failure can be relieved by appropriate treatment, such as the use of diuretics such as bumetanide to reduce edema and beta blockers such as metoprolol to relieve heart failure. Note that the use of such drugs may lead to adverse reactions such as dizziness, thirst, and fatigue, and are contraindicated in patients with allergies, diabetes, and myocardial infarction. Patients diagnosed with heart failure need to go to the hospital for treatment in time to avoid aggravation of the condition and serious consequences, if necessary, please use the drug under the guidance of a physician.