Swollen feet and calves may be related to keeping the same posture for a long time, late pregnancy, kidney failure and other reasons. 1. Keeping the same position for a long time: due to sedentary and standing for a long time, keeping the same position all the time, the venous return is relatively slow, and the venous blood will be stagnant in the lower limbs, resulting in swelling of the feet and calves. 2. Late pregnancy: Due to the gradual increase of the uterus in late pregnancy, the compression of the inferior vena cava will cause obstruction of venous return in the lower limbs, so there is physiological edema of the calves and feet. 3. Renal failure: due to the decrease in glomerular filtration rate, the metabolic capacity of the kidneys decreases. Insufficient excretion of water or inability to excrete water will lead to water retention in the body, resulting in swelling of the feet and calves. Swollen feet and calves can also be seen in hypoproteinemia and other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment or therapy.