The causes of swollen feet and hands are: 1. excessive walking, resulting in swollen hands and feet due to obstructed blood circulation; 2. rheumatoid arthritis, resulting in swollen and painful joints; 3. hypoproteinemia, liver failure, nephrotic syndrome, gout, cerebrovascular disease, etc.; 4. mucus edema of the limbs in hypothyroidism. The presence of swollen hands and feet requires examination of liver and kidney function, thyroid function, rheumatic immune series, uric acid, blood routine, blood sedimentation and other items to identify the causes and actively treat the symptoms.