Multiple sclerosis (MS) has a multifactorial etiology located at the interaction point of environmental factors--nutritional, geographic, infectious, etc.--with genetic factors, which confers susceptibility to disease or alters its development. This research presents a case study focused on complex assessment of a patient using clinical and functional assessment, biomechanical gait evaluation using RSScan force plate. Biomechanical parameters (contact area, load, impulse, force, pressure, foot balance) are the parameters that we obtain after force plate measurements. Analyzing the results of the functional assessment, it is found an anatomical functional abnormality with a tendency to increase. Biomechanical tests show an asymmetric gait due to the impact of neurological disorders generated in the proprioceptive system. Global analysis of values (surface contact, pressure, force, load, impulse, active contact area) indicates the fact that there is a tendency to develop a higher pressure in the anterior-medial region of the plant in an attempt to maintain balance. It is a tendency to increase the active contact area in the forefoot region; this increase is explained by the body tendency to develop compensatory mechanisms to maintain balance.