The aim of this study is to determine the effect of percutaneous electrical nerve stimulation on post cesarean pain. This study is a clinical trial with random allocation that samples will be divided in three groups: intervention, placebo, and control. Inclusion criteria will be singleton pregnancy, elective cesarean with transverse incision, same anesthesia, same gynecologist, same narcotic dose, newborn with apgar more 7, , having pain in incision site, do not have medical complications, do not use drugs.
Exclusion criteria will be having pace maker, skin irritation, sensitivity to electrodes, fever and hemorrhage during 24 hour after cesarean .
for evaluation of pain severity visual analog scale will be used. In three groups pain will be determined before intervention . Then in intervention group transcutaneous electrical nerve stimulation electrode will be insert and will be used for 30 minutes. After that pain will be assessed every 6 hours for 24 hours after cesarean and TENS device will be on for 30 minutes. Each time before and after intervention pain severity, blood pressure, breath rate and pulse will be evaluated. In placebo group electrods will be insert at the same place but device will be off. There is not any intervention for control group and they receive routine care. In this two groups assessment will be the same as intervention group.