had large loop treatment

Hello I had large loop treatment today , I was in so much pain  while she done it , is this normal ? She put the locak in then went straight ahead at done the treatmeabt am I right in thinking that shouldnt she waited for a bit to let the local work and make me numb , it hurt loads obv I tensed up and she said it was hard as I kept movin it was like shottong a flyin misile , made her have to proper aim , has anyone felt proper pain and is it normal for them to put local in and do treatment straight away , thought you had to wait .