Does TENS Therapy Really Relieve IUD Insertion Pain?

Managing procedural discomfort remains a major challenge in modern outpatient gynaecology. Many women fear IUD insertion pain, which often discourages them from choosing long-acting reversible contraception. Consequently, clinicians constantly seek effective non-pharmacological tools to improve patient comfort during uterine interventions.

Evaluating TENS for IUD Insertion Pain Relief

Transcutaneous electrical nerve stimulation delivers pulsed currents through dermal electrodes. Therefore, researchers evaluated whether high-frequency TENS attenuates acute procedural distress. Specifically, a randomized controlled trial investigated active high-frequency stimulation against a sham control. The investigators enrolled ninety-nine participants undergoing either levonorgestrel 52-milligram or CuT380A placement. Furthermore, participants rated their perceived discomfort using a standard 100-millimetre visual analog scale.

Key Trial Findings and Primary Outcomes

The trial demonstrated that high-frequency TENS did not reduce insertional discomfort. In fact, mean pain scores at insertion were nearly identical between groups. The active treatment group reported an average score of 50.8 millimetres. Similarly, the sham group recorded a mean score of 50.6 millimetres. Thus, the intervention showed no statistically significant therapeutic benefit.

Additionally, total procedure duration remained similar across both trial arms. Nulliparous participants experienced higher overall pain than parous women. However, active TENS failed to reduce pain even within the nulliparous subset. Nulliparous active recipients reported 58.8 millimetres compared to 59.3 millimetres for sham controls. Consequently, neither parity status nor device settings altered the procedural outcome.

Clinician Perceptions versus Patient Reality

Notably, the study revealed a significant discrepancy between clinician assessments and participant experiences. Healthcare providers completed post-procedure evaluations to estimate patient discomfort. Although clinician estimates correlated mildly with patient scores, providers systematically underestimated peak procedural pain. Hence, this finding highlights an ongoing blind spot in routine clinical care.

Furthermore, accurate pain appraisal remains vital for patient autonomy and treatment adherence. Doctors must recognize that acute uterine stimulation triggers intense visceral sensations. Therefore, teams should prioritize comprehensive multimodal counselling and established analgesic protocols.

Clinical Implications for Practice in India

Intrauterine devices provide crucial, reversible contraception across public and private healthcare centres in India. However, anticipatory anxiety and fear of pain often hinder wider adoption. Because TENS demonstrated no clinical benefit, clinicians should not rely on it as a solitary solution. Instead, practitioners should consider validated options such as paracervical nerve blocks or topical lidocaine formulations. Moreover, empathetic communication significantly reduces pre-procedural stress and improves the overall patient experience.

Frequently Asked Questions

Q1: Does high-frequency TENS reduce IUD insertion pain?

No, high-frequency TENS did not show any significant reduction in pain scores during IUD placement compared to sham therapy in randomized trials.

Q2: Why do nulliparous individuals experience higher pain during IUD insertion?

Nulliparous women typically have a narrower cervical canal and have not experienced cervical dilation, which increases visceral nociception during uterine sounding and insertion.

Q3: How accurately do clinicians evaluate patient pain during IUD placement?

Studies indicate that clinicians frequently underestimate the severity of peak insertional pain reported by patients, emphasizing the need for objective pain assessment tools.

References

1. Kus LH et al. Transcutaneous electrical nerve stimulation for pain management during intrauterine device insertion: a randomized controlled trial. Am J Obstet Gynecol. 2026 Oct 08. doi: undefined. PMID: 42849809.
2. Coleman K, Carter C. Pain control during intrauterine device insertion: Transcutaneous electrical nerve stimulation. J Am Assoc Nurse Pract. 2024 Oct 1;36(10):594-596. doi: 10.1097/JXX.0000000000001031. PMID: 38787344.
3. Gemzell-Danielsson K, Mansour D, Fiala C, Kaunitz AM. Management of pain associated with the insertion of intrauterine contraceptives. Hum Reprod Update. 2013;19(4):419-427. doi: 10.1093/humupd/dmt022.