<s>[INST] I had a balloon inserted in my right side due to a blocked artery which caused extreme pain in my right leg and calf. This was performed in July. I walk 7 miles daily and suddenly I am having pain again. Could something have happened to the balloon? I [/INST] Hello, It is necessary to exclude a possible complication or another artery blockage, considering your past medical history.  For this reason, I recommend going to the ER for a physical exam and a Doppler ultrasound of your leg vessels.  If the Doppler results normal, you should consider a musculoskeletal pain as a possible cause underlying your complaints.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.  </s>