The main causes of swollen feet are as follows: I. Sedentary or standing, appearing after due to impaired circulation in the lower extremities. After proper activities, elevating the lower extremities while sleeping, hot water soaking the feet and other treatments, the edema of the feet gradually eases. Second, caused by heart disease, such as severe heart failure patients, in addition to swollen feet, can also be accompanied by edema of the lower limbs. Gout, caused by abnormal purine metabolism, occurs after drinking alcohol or eating seafood, blood uric acid test can confirm the diagnosis. If there is no fracture or joint displacement, it is only the swelling after soft tissue injury to the foot. Local cold compresses within 24 hours after injury can help reduce edema and relieve pain, and local hot compresses after 24 hours can help absorb edema. At the same time, local spraying of Woundco Ling spray or Yunnan Baiyao spray can relieve the symptoms. Fifth, kidney disease, hypothyroidism, severe malnutrition, etc., can also appear.