Effectiveness of Transcranial Direct Current Stimulation (tDCS) in the Management of Complex Regional Pain Syndrome

This protocol aims to compare a group receiving a tDCS protocol with a sham control group. The hypothesis of this study is that tDCS is effective in treating CRPS in terms of reducing pain and the functional and emotional consequences of pain. The primary objective of the study is to evaluate the effectiveness of tDCS on pain in patients with CRPS (complex regional pain syndrome), measured by the numerical pain scale (EN), after one month of treatment and one month after the end of treatment, compared to the sham arm. The secondary objectives are: * To assess anxiety and depression symptoms (HAD) * To assess the functional impact of pain (Concise Pain Questionnaire - QCD) * To assess central sensitization (Central Sensitization Inventory - CSI) * To identify adverse effects related to tDCS