The symptoms of swollen feet may be physiological edema or pathological edema, which can be caused by a variety of reasons. Common causes mainly include sedentary, excessive salt intake, abnormal hormone levels, liver disease, kidney disease, etc. If the symptoms do not ease after treatment or continue to recur, it is recommended that patients visit a hospital to clarify the cause and carry out targeted treatment. I. Physiological edema: 1. Sedentary and standing: If sitting and standing for a long time, it can lead to slowed blood circulation and poor reflux in the veins of the lower extremities, which can lead to edema symptoms in the feet, and may even cause varicose veins in the lower extremities, low skin temperature and swelling in the lower extremities; 2. Abnormal hormone levels: Mostly seen in menstruating women, pregnant women and other people, such as elevated levels of estrogen and progesterone, which can also lead to patients The symptoms of swollen feet, mostly ankle edema. Pathological edema: 1. liver diseases: commonly liver cirrhosis, if the patient suffers from cirrhosis, hypoproteinemia or elevated hydrostatic pressure in the blood vessels of the liver can occur, thus causing edema of the lower limbs; 2. kidney diseases: if the patient suffers from glomerulonephritis, renal failure and other kidney diseases, this can lead to a decrease in glomerular filtration rate function or colloid osmotic pressure, resulting in water retention in the body or leakage to the interstitial tissues, causing edema. The main manifestation is facial edema, which can also lead to foot swelling, and in serious cases, it may also be accompanied by whole-body edema; 3. Heart diseases: most heart diseases, such as heart failure and coronary heart disease, can lead to the impact of blood circulation in the body, resulting in the phenomenon of water retention, which can lead to edema, and due to the low location of the foot, it will swell more obviously under the influence of gravity. In addition, patients with a history of foot trauma such as sprains, diabetes, arthritis, etc. may also have swollen feet, and patients who are bedridden for a long time should also be alert to deep vein thrombosis in the lower extremities when they have swollen feet on one side.