What should you know about using a TENS unit on your stomach?

TENS, or transcutaneous electrical nerve stimulation, sends mild electrical pulses through adhesive electrodes on the skin. The sensation may feel like tingling or tapping and is intended to help manage some types of pain. For abdominal discomfort, the source may be muscle strain, a surgical recovery, menstrual cramps, or an internal condition, so electrical stimulation does not identify or treat the cause.

Do not place electrodes over broken, irritated, infected, numb, or recently operated skin. Avoid the front of the neck, head, and chest. Abdominal placement needs extra care during pregnancy, after abdominal procedures, or when the cause of pain is unclear.

Read the device instructions and start at the lowest comfortable intensity. Place clean, intact pads on healthy skin around the painful area rather than directly across a wound. Keep the electrodes separated, check the skin during and after use, and stop if you feel burning, sharp pain, dizziness, or worsening symptoms. Do not sleep, bathe, drive, or exercise while connected unless the manufacturer and a clinician specifically say this is suitable.

Discuss abdominal use with a clinician if you have a pacemaker, implanted electrical device, reduced sensation, seizure history, or are pregnant. A physiotherapist can help choose pad positions and combine TENS with movement or other treatment.

Get urgent medical help for severe or rapidly increasing abdominal pain, a rigid or swollen abdomen, fainting, repeated vomiting, blood in vomit or stool, fever with marked illness, or pain with chest symptoms. Arrange medical assessment when pain persists, keeps returning, follows an injury, or comes with urinary, bowel, or menstrual changes. Do not use TENS to delay assessment of unexplained abdominal pain.

Ask: Is TENS appropriate for the suspected cause of my stomach pain? Where should the pads sit, and which areas should I avoid? Could my medicines, pregnancy, procedure, reduced sensation, or implanted device change the advice? What symptoms mean I should stop using it and seek care?