<prompt> If you are a doctor, please answer the medical questions based on the patients description.I was in the hospital a month ago today and thought I was having a heart attack they did a catheter now a week ago in the same leg I started to get real bad pains in my foot mainly my right big toe and that was the same leg that the catheter was done. Now the pain has stoped but my toe is real cold and the nail is turning blue and going numb should I worry.  <response>: Hello, Regarding your concern, I would explain that your symptoms do not seem to be related to the catheterization. For this reason, I would recommend consulting with your attending physician for a physical exam and performing some tests: - a Doppler ultrasound of the leg vessels-complete blood count, PCR, ESR for inflammation- uric acid plasma levels for high uric acid levels. Nerve conduction studies may be needed if all the above tests result normal, in order to exclude a possible pinched nerve, although it is very atypical for a pinched nerve to cause blue color toe. Hope I have answered your query. Let me know if I can assist you further. 