Inclusion Criteria:  SSc meeting ACR-EULAR (American College of Rheumatology- European League Against Rheumatism) criteria. Treatment by proton pump inhibitor (PPI) initiated for at least 3 months. Patient's written consent Affiliated with social security system  Exclusion Criteria:  Patients who have previously received central or peripheral neurostimulation treatment regardless of indication. People equipped with an active pacemaker in the area of application of the stimulation electrodes. People with dermatological disease in the area of application of stimulation electrodes People with recent venous or arterial thrombosis (less than one month) People with a cochlear implant near the stimulation site People followed for proven heart disease Person who are protected under the act Pregnant or breastfeeding woman