Abstract: A system for determining differential temperature in body part includes a sensor device(s) with a base having first side and second side opposite to first side; and temperature-sensitive element(s) being provided on first side of base, wherein when sensor device(s) in use, first side is in contact with body part of user for predefined time period and temperature-sensitive element(s) senses temperatures of different regions of body part; camera(s) configured to capture image(s) of first side, wherein image(s) captured within given time period from time of removal of contact between first side and body part; processor(s) communicably coupled to camera(s), wherein processor(s) configured to: identify, in image(s), image segment(s) representing temperature-sensitive element(s); recognize pixel values of pixels image segment(s); determine temperatures of different regions of body part, based on pixel values of pixels in image segment(s), temperatures of different regions of body part form differential temperature