Lower extremity edema caused by heart disease can be relieved by limiting sodium intake, diuresis, and reducing cardiac compression. Common heart diseases that can cause lower limb edema are: right heart failure, constrictive pericarditis, pericardial effusion, etc. 1. Right heart failure: right heart failure will lead to insufficient effective circulating blood volume, reduced glomerular filtration rate and aldosterone, and the patient’s lower extremities will have sodium retention. Patients can relieve sodium retention by restricting water and sodium intake, and can also be treated with diuretics such as hydrochlorothiazide, furosemide and spironolactone. 2. Constrictive pericarditis: Constrictive pericarditis will compress the heart, limit myocardial diastole, and reduce the amount of return blood, thus leading to peripheral blood stasis. Patients can relieve lower limb edema by pericardial puncture, reducing cardiac compression and draining pericardial effusion. 3. Pericardial effusion: Pericardial effusion can lead to diastolic limitation of the heart and obstruction of venous return, thus leading to lower limb edema. Generally speaking, pericardial effusion can be cleared through pericardial effusion drainage to alleviate the symptoms. It is recommended that the patient go to the local hospital as soon as possible to clarify the cause of the disease and treat the cause.