My husband has CRPS in both feet. He had a nerve block on the left in November which went fine and it helped with the pain. Two weeks ago, he had an attempted nerve block on the left. The doctor said he could not get past some bone in his spine to get to the sympathetic nerves . Three separate times my husband felt a sharp pain from his thigh down to his knee while the doc attempted to get past the bone. The doc finally gave up without completing the procedure. Since then my husband has been in horrible pain and has swelling in his leg and especially his knee. He says this is not the same pain as the CRPS. Pain killers are really not helping. He had an MRI of the spine this morning. Could the doc have hit the sciatic nerve or some other nerve? It s bad enough he has the pain of CRPS but now this is making his pain 100 times worse. Thanks..