Is Transcutaneous Electric Nerve Stimulation safe while breastfeeding?

Summary of use during breastfeeding

Transcutaneous electric nerve stimulation (TENS) is a method of using electrical stimulation of nerves using electrodes affixed to the skin. It is most often used to treat pain. Two small, low-quality studies found it useful for alleviating uterine pain caused by breastfeeding in the early postpartum period in hospitalized women. There are also anecdotal reports of TENS being used for nipple stimulation to induce lactation in adoptive mothers.[1] However, no scientific evaluation of the safety or efficacy of this use could be located.

Effects on the breastfed infant

Relevant published information was not found as of the revision date.

Effects on milk supply

A small, single-blinded study in Sweden compared high-intensity to low-intensity TENS for the alleviation of post-partum uterine pain during breastfeeding in the 24 hours following birth. The high-intensity TENS was more effective.[2]

A small nonblinded study in Brazil compared uterine pain in hospitalized women who were experiencing uterine pain during breastfeeding in the immediate postpartum period. One group received TENS and the other did not. None of the patients used any other form of analgesia. Pain experienced at two different occasions during breastfeeding were compared. The decrease in pain from the first to second occasion was greater in the group receiving TENS.[3]