The most common causes of edema in the lower legs of the elderly in their 60s are poor posture, lower extremity venous thrombosis, renal edema, cardiogenic edema and so on. 1. Bad posture: If the elderly stand for a long time, it is easy to cause poor blood return to the lower limbs, easy to form edema, usually need to rest fully, but also can be appropriate when lying down with a soft pillow to elevate the lower limbs, to promote the return of blood to the heart. 2. Lower extremity venous thrombosis: poor venous return of the lower extremities due to various reasons, resulting in hypercoagulable state of the blood, and ultimately lead to thrombosis, the patient will be prone to swelling of the lower legs, accompanied by pain in the legs, and some patients will also have bruising and purple skin. 3. Nephrogenic edema: the renal function of the elderly will gradually decline, the metabolic ability will be weakened, if also suffers from chronic nephritis, glomerulonephritis and other diseases, will affect the normal function of the kidneys, resulting in the discharge of water abnormally, causing calf edema. 4. cardiogenic edema: if the elderly cardiac insufficiency, it is easy to cause venous stasis in the circulation, which in turn causes tissue interstitial fluid aggregation, causing swelling of the calves. Caused by more than 60-year-olds calf edema causes more, if the rest did not ease, it is recommended that timely to the hospital to find out the cause of the disease, by the doctor targeted treatment.