Swelling of the elderly feet in the afternoon disappears in the morning may be due to poor circulation, varicose veins of the lower extremities and other reasons. 1. Poor blood circulation: the elderly sit for a long time and stand for a long time will be due to the effect of gravity leads to blood flow downward, poor blood circulation, often swollen legs and feet performance. At night, when the body sleeps flat, the blood circulation speeds up and the swelling of legs and feet can be relieved, so the old people will have the phenomenon that the swelling of legs and feet in the afternoon disappears in the morning. 2. Varicose veins of the lower limbs: when the elderly suffer from varicose veins, the blood vessels of the lower limbs are tortuous, affecting blood circulation. After resting at night, the swelling will go down in the morning, so the swelling of the feet will disappear in the morning. If the phenomenon of swollen feet in the afternoon and disappearing in the morning occurs, it is recommended to consult a doctor in time for a clear examination and targeted treatment.