Epidural: This method involves having an injection of local anaesthetic into your lower back, just above your waist. An epidural completely blocks feeling from the waist down. It's very effective and 9 in 10 women who have one have no pain at all. However, there are side-effects. If you have an epidural, your second stage of labour may take longer because you won't feel the urge to push. It may also make moving around more difficult because you have less feeling in your back and legs.
Attribution: BUPA