If you do need an episiotomy, you'll get an injection of local pain relief before the cut (though you may not need a local if you're already anesthetized from an epidural or if your perineum is thinned out and already numb from the pressure of your baby's head). (whattoexpect.com)
Most stings simply cause local pain and / or swelling. (vscot.com)
After delivery of your baby and the placenta, the practitioner will stitch up the cut (you'll get a shot of local pain medication if you didn't receive one before or if your epidural has worn off). (whattoexpect.com)