Hi, I believe that a good physical workup should be performed to discover the most likely cause of the localized back pain. It seems that you ve lost nearly all of the weight you gained during the pregnancy so mechanical causes of back pain are probably less likely. Still a good examination to distinguish different types of back pain including the possibility of chronic pain following the c-section is worthwhile and can help identify even other causes of chronic low back. Psychological stressors causing back, shoulder, and neck pain are very common and even physical stressors such as working on computers without proper back/neck support or not taking frequent enough breaks, or being tensed in the shoulders and arms while typing constantly can play into the picture. In short, a number of potential causes can be in play. A good physical examination by a good physician with proper imaging studies and other workup will do a lot of elucidate the root of your problem. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Dariush Saghafi, Neurologist