Akers AY, et al. - This work was planned to assess the effect of a 1% lidocaine paracervical nerve block on pain during intrauterine device (IUD) insertion compared with a sham block in adolescents and young women. In adolescents and young women, 10-mL 1% lidocaine paracervical nerve block reduced pain during IUD insertion compared with a sham block with pressure on the vaginal epithelium.