Swollen feet in the bedridden elderly can be a symptomatic manifestation of many diseases, such as swollen feet need to consider cardiac insufficiency, venous return obstruction, deep vein thrombosis, hypoproteinemia and so on. 1. Cardiac insufficiency: when the right heart fails, the body circulation is stagnant, and edema of the lower limbs will appear. 2. Venous return obstruction: venous blood vessels are blocked and blood can not return normally, causing lower limb edema and pain. 3. Deep vein thrombosis: long-term bedridden, high age, will trigger deep vein thrombosis, the main symptom is lower limb swelling and pain. 4. Hypoproteinemia: bedridden elderly due to reduced food intake, digestion and absorption function and metabolic ability to reduce the causes of insufficient protein intake or malabsorption, thus causing hypoproteinemia, resulting in edema. The above are only some of the common causes. If the symptoms persist, we should consult a doctor in time and standardize the treatment according to the doctor’s prescription after a clear diagnosis.