The goal of this interventional study is to test of efficacy of sacral Transcutaneous Electrical Stimulation (TENS) in patients with chronic pelvic pain.

The main questions it aims to answer are:

1. Is sacral transcutaneous electrical stimulation (TENS) effective to reduce/relief pain in patients with chronic pelvic pain?
2. Is the effect of TENS comparable to sham stimulation therapy in patients with chronic pelvic pain?

Our study aiming to test the efficacy of sacral transcutaneous electrical stimulation (TENS) intervention in patients with chronic pelvic pain. We aim to test the efficacy and compare it with sham stimulation therapy in chronic pelvic pain.

Inclusion Criteria:

• Female with chronic pelvic pain for ≥6 months
• 18-65 years old
• Visual Numeric Scale of Pain score ≥4/10
• Voluntarily participate to the study

Exclusion Criteria:

• Pregnancy
• Having severe medical and/or psychiatric disorder
• Malignancy
• Chronic infection
• Inflammatory musculoskeletal system disease
• Skin infection in sacral/pelvic area
• Having implanted neuromodulatory device (such as pacemaker or defibrillator)
• Refusing to participate the study

Only participants are blinded for the intervention. Care provider (physiotherapist), investigator (medical doctor, physiatrist) and outcomes assessor (medical doctor, physiatrist) are not blinded and they are know which intervention (TENS or sham stimulation) is provided to the patients.