Abstract: An approach is described for identifying sites of imminent skin breakdown in amputee prosthesis users. Thermal recovery time (TRT) for a limb is optically determined using an infrared camera. TRT is the time interval for the temperature of the skin to achieve 70% of its maximum value during a 10-minute recovery period after a subject has completed a standing/walk-in-place procedure. A limb tolerance map is produced in which 5×5 pixel squares are colored to indicate their TRT and labeled to indicate a temperature vs. time curve (indicative of blood flow characteristics) for the square. TRT data can also be used for prosthetic fitting and socket replacement, by locating tolerant/intolerant regions on a limb and providing a visual “limb tolerance map” for a proposed socket design and applied to other areas, such as the design of shoes for patients with insensate feet, cushions for wheelchair users, and mattresses for bedridden patients.