Swollen feet may be caused by factors such as trauma, arthritis, and disorders in kidney function and liver function. 1. Trauma: Muscle injuries or ligament strains caused by certain factors may cause pain in the feet, which may lead to swelling. 2. Arthritis: Inflammation of the joints of the feet can cause joint swelling and pain, resulting in symptoms of swollen feet, and when the condition is more serious, it may also affect the normal activities of the human body. 3. Abnormal kidney function: Abnormal kidney function may cause water to be unable to be excreted from the body normally, which may be retained in the body and lead to swollen feet. 4. Abnormal liver function: abnormal liver function may lead to a decrease in protein content in the body, which in turn affects the osmotic pressure of blood vessels, causing edema in the patient’s feet. There are other causes of swollen feet, it is recommended that patients go to the hospital to check the causes of swollen feet, under the guidance of the doctor according to the condition of targeted treatment.