Hello, I have studied your case with diligence. Carditis is common in RA patients. You may need cardiac check up for foot swelling. When such patients come to our hospital I advise them blood test like RA factor, ACCP, ESR, complete blood count, to see for prognosis and severity. There is good role of diet and achieve correction through it You need to avoid bakery items, high protein diet, and curd, milk and milk products. Avoid cold and fermented food, bitter and sour food. Eat fresh fruits, vegetables, salads. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care