I went to dentist a month or 2 ago I had root canal treatment they prepped the tooth witch took alot of injections over 10 well over I had to go bk for the crown fitting but in the mean time I was getting pins and needles in my tongue I told the dental nurse this on my return she said it was I had alot of injections there help in hand said I had that many injections it would of took down a elephant I stop get pins and needles to this day not as constant but its there