Swollen feet in children may be related to soft tissue injury, fracture, hypoproteinemia and so on. 1. Soft tissue injury: children may twist their feet accidentally while playing, usually unilateral, and may show swollen feet, which are usually accompanied by pain. 2. Fracture: If a child’s foot is impacted by an external force, a fracture may occur, which may also show symptoms of swollen feet. 3. Hypoproteinemia: usually caused by malnutrition, renal insufficiency, etc., the plasma albumin is relatively low, which will cause swelling, such as swelling of the feet, abdomen, etc., which needs to be determined by examination, usually symmetrical swelling of the feet. Swollen feet in children may also be related to other causes, it is recommended to go to the hospital in time to identify the causes, under the guidance of the doctor treatment.