Recently, several studies have investigated the safety and efficacy of the Stoller afferent nerve stimulation (SANS) treatment in Multiple Sclerosis (MS) patients. However, because of the differences among the published protocols (percutaneous versus transcutaneous stimulation, stimulation site, total number of sessions), and the absence of data on the duration of the effect, this treatment is not yet currently included in the rehabilitation programs. The present study aims at evaluating the efficacy of a protocol of SANS in the short- and medium-term follow-up. The efficacy of the proposed stimulation protocol on the physiological parameters of bladder function will be also investigated.