Stress urinary incontinence (SUI) — involuntary loss of urine during physical efforts such as coughing, sneezing, laughing, or exercise — affects up to 50% of women at some point in life and is the most common form of female urinary incontinence. Although it is not a life-threatening condition, the impact on quality of life is profound: restriction of physical activities, social isolation, anxiety, and depression are frequently reported. Pelvic floor muscle training (PFMT) is the first-line treatment recommended by the main urologic guidelines, but adherence is low and results are variable. A meta-analysis published in Frontiers in Medicine in January 2025 evaluated electroacupuncture as adjunctive to PFMT for female SUI, bringing together 11 randomized clinical trials.
The study evaluated electroacupuncture combined with pelvic floor muscle training versus sham electroacupuncture with PFMT, with outcomes measured by the 1-hour pad test (amount of urine lost in grams), frequency of incontinence episodes, quality-of-life scales (ICIQ-SF — International Consultation on Incontinence Questionnaire), and assessment of pelvic floor muscle function (surface electromyography or manometry). The most frequently used acupoints in the protocols were CV-4 (Guanyuan), CV-3 (Zhongji), SP-6 (Sanyinjiao), BL-33 (Zhongliao), and BL-35 (Huiyang) — points with recognized influence on detrusor function and pelvic floor tone.
MAIN RESULTS — 11 RCTS, FEMALE STRESS URINARY INCONTINENCE
Why does electroacupuncture act on stress incontinence?
Stress urinary incontinence results from the failure of continence mechanisms during abrupt increases in intra-abdominal pressure: the external urethral sphincter (skeletal muscle) and the pelvic floor do not generate sufficient reflex contraction to overcome the pressure transmitted to the bladder. Electroacupuncture may contribute to the recovery of these mechanisms through two main pathways. First, stimulation of BL-33 and BL-35 — located at the S3 and S4 sacral foramina — directly activates the nerve roots of the pudendal plexus, which innervates the external urethral sphincter and pelvic floor muscles, potentiating the strength of voluntary and reflex contraction. Second, stimulation of CV-3 and CV-4 modulates the micturition nuclei of the sacral spinal cord (S2-S4), adjusting the balance between detrusor and sphincter — a mechanism analogous to that of sacral neuromodulation, which is the basis of third-line treatments such as Interstim®.
Comparison with sacral neuromodulation and surgery
The treatment spectrum for SUI ranges from PFMT (first line) to suburethral sling surgery (third line), passing through periurethral injections of bulking agents (second line) and implantable sacral neuromodulation. Electroacupuncture, by stimulating the S3-S4 roots through the BL-33/BL-35 points, mimics in a non-invasive way the principle of sacral neuromodulation — one of the most effective therapies for refractory SUI, but which requires surgical implantation of an electrode and generator at a cost of tens of thousands of reais. Electroacupuncture thus emerges as a less invasive, more accessible alternative with a superior safety profile for patients who do not respond adequately to PFMT or who seek to avoid or postpone surgery. There are no data from this meta-analysis on direct comparison with sling surgery, but positioning as an adjuvant to PFMT in early and moderate phases is well supported.
Frequently Asked Questions
For mild to moderate cases of SUI, electroacupuncture combined with PFMT may produce sufficient improvement to avoid surgery or delay it significantly. For severe cases — with continuous loss, SUI that does not respond to any conservative treatment after 6 months, or SUI associated with significant genital prolapse — surgery remains the treatment with the highest cure rates. Electroacupuncture is more appropriately positioned as a second-line conservative option, after failure of PFMT alone and before surgical consideration. The decision should be shared with the patient and with the responsible urologist or gynecologist.
The meta-analysis exclusively evaluated women with SUI, but there are pilot studies and case series on electroacupuncture in post-radical prostatectomy incontinence — a condition different in its pathophysiology. The mechanisms of sacral neuromodulation via BL-33-BL-35 are theoretically applicable, but the male pelvic floor anatomy and sphincteric mechanisms are distinct. Specific controlled studies are awaited for this population before definitive recommendations. In clinical practice, medical acupuncturists have reported anecdotal benefits, but systematic evidence for men with post-prostatectomy SUI is still insufficient.
Postpartum SUI is very frequent, but many cases resolve spontaneously in the first 6-12 weeks. It is recommended to wait for spontaneous resolution and to start PFMT early. Electroacupuncture can be started after obstetric clearance (generally 4-6 weeks postpartum for vaginal deliveries), provided there is no puerperal infection, episiotomy dehiscence, or other local complications. In women who are breastfeeding, electroacupuncture is safe. There is no specific hormonal or metabolic contraindication for the puerperium. The physician should individually evaluate the condition of the pelvic floor before starting the protocol.
Founded in 1989 by physicians trained at the University of São Paulo (USP) and specialized in China, CEIMEC is a Brazilian national reference in the teaching and practice of medical acupuncture. With more than 3,000 physicians trained over 35 years, it collaborates with HC-FMUSP and is recognized by the Brazilian Medical College of Acupuncture (CMBA/AMB).