It is a common misconception that back pain always stems from the pressure of a slipped disc ,facet joint injury or a trapped nerve. This is misleading, the cause of pain is also
soft tissue inflammation stimulating nerves, causing the pain signal.so after opertaion,herniated disc gone,but perhaps you still suffer from soft tissue inflammation in lower back which can lead to same pain as you said.So more surgeries might not help,I guess.
Deep and intensive acupuncture work for FBSS.