The causes of facial edema are mostly due to the following diseases: 1. heart disease, especially in patients with heart failure grade III and IV, often manifesting as chest tightness that is obvious after activity and relieved after rest and easy to appear at night. 2. thyroid disease, hyperthyroidism or hypothyroidism can occur, such as the performance of emotional irritability, anxiety, excessive sweating, food loss, increased heart rhythm and other changes. 3. kidney disease, such as glomerulonephritis, nephrotic syndrome and oliguria in renal failure can occur.4. Other systemic diseases of various systems, such as tumors or liver diseases, with hypoproteinemia, can lead to facial or general edema. Patients with facial edema should first go to the hospital for clear examination, such as kidney function, liver function, thyroid function, cardiac function and other related tests, and if necessary, heart ultrasound, etc. Only when the cause is identified can effective treatment be carried out. If it is caused by abnormal thyroid function, thyroid hormone replacement therapy is required.