I had only 2 blocks,,the dr openly said that he missed the 1st time,,the 2nd ,my leg turned red and i think it aggravated and incited a spread,,I did ask if he would run a series of them as other had done,because from listen to others,,it sometimes takes a few in order to work,,but i think something spooked him and he refused,but there are some on here that do get relief,,,best of luck,,,bobber