Hello there I have read through your question and understand your concern. Sudden swelling in feet can be due to a number of reasons. It has to be physically examined to determine whether the swelling is pitting or not. Also whether you have any associated symptoms like dyspnea cause swelling over feet can also be an indication of heartfailure. I don t think the swelling can be due to disc compression. Moreover you have not mentioned whether you are having tingling or numbness in your feet. It can be said conclusively only on clinical examination. I hope that answers your question. If you have any further questions please feel free to write. Thank you for choosing healthcare magic.