The aim of this study is to compare the lidocaein pomad, Indomethacin suppository and mefenamic acic capsule on the pain of post episiotomy.The primiparous women with singleton pregnancy and 38-42 weeks of gestation will participate in the study.The sample size is ninety and the women will randomely allocated to three groups receiving the indomethacin, lidocaein and mefenamic acid . For data collection, we will use visual analogue scale to assess the severity of pain . At the time of arriving the women to post delivery ward, with complain of pain, the severity of perineal pain will detect and then the drugs will given.The first group will receive the 50 mg indomethacin, the second group will receive the lidocaein and the third group will receive the 250 mg mefenamic acid . Pain scores will assess in 2-6-12 and 24 hours after the delivery. If nessessary ,we will repeat the drugs every 6-8 hours until 24 hours after the delivery .The drugs will administrated by the obstetrician and all of women will receive the standard prenatal care in three groups .Inclusion criteria are: medio-lateral episiotomy, length of episiotomy <5 cm, no forceps and vacuum, no currage and the equal of lidocaein infiltration for episiotomy .Exclusion criteria are: laceration of perineum, length of episiotomy >5 cm, use of forceps and vacuum,currage and inflammation of perineum