My mother having swelling of face and feet ? My 65 years old mother is suffering from diabetes for the last 20 years. Around three years back, the thumb of her left leg was operated as she had gangrene but it was not actually gangrene. After that she got a mild heart attack and many other problems due to which she was hospitalized. Last week, she experienced swelling on her feet and face. What causes swelling of face and feet? She takes insulin of 30 mg twice a day and around 9 tablets in morning and evening. The doctor told us that her kidneys are on borderline to get damaged. She also gets problem due to rise in blood pressure, creatinine, potassium and many other parameters.