Abstract: In a vasodilatation index measuring and analyzing system, a measuring unit includes a measuring device for measuring standard and comparative pulses of a digit of a subject in relaxed and comparative states, respectively. An external pressure is applied to a limb part of the subject to occlude blood flow to the digit following measurement of the standard pulse. The comparative pulse is measured upon release of the external pressure. A pre-processing unit is coupled to the measuring unit for filtering noise from and digitizing the standard and comparative pulses obtained by the measuring device. An analyzing unit is coupled to the pre-processing unit for calculating standard and comparative pulse areas of at least one cycle of the standard and comparative pulses processed by the pre-processing unit, respectively, and for subsequently calculating a pre-defined index related to a difference between the standard and comparative pulse areas.