Evaluation of the Analgesic Effect of Direct Current Stimulation in the Treatment of Pelvic Pain, Comparing Three Groups: Trans-spinal Stimulation, Ganglionic Stimulation, and Placebo. A Randomized Double-blind Study

Inclusion Criteria: * Patient aged 18 to 85 years, suffering from pelvic pain for more than one year (excluding musculoskeletal causes). * Patient with stable ongoing medication (analgesic or otherwise) for at least one month. * Patient for whom lack of response to conventional treatments has led the pain specialist or referring physician to consider non-pharmacological therapeutic options. * Patient reporting a pain intensity score \>3 on the Numeric Visual Pain Scale (NVPS) during pre-screening. * Patient affiliated with the national health insurance system or an equivalent scheme. * Patient who has provided written informed consent. Exclusion Criteria: * History of drug addiction. * History of psychiatric disorders likely to interfere with the proper conduct of the study. * Patient with skin lesions in the lumbar region. * Person unable to understand the study protocol. * Individuals covered by Articles L1121-5 to L1121-8 of the French Public Health Code, corresponding to all protected persons: pregnant women, women in labor, breastfeeding mothers, individuals deprived of liberty by judicial or administrative decision, or under legal protection. * Subject currently in the exclusion period of another clinical trial