... pack in microwavable container, set the microwave at mediumpower ,and heat pack at 30 second intervals until desired temperature is ... achieved.Or cover pack completely with hot water and soak for 3 - 5 minutes. 2)To cold, ... physical therapy for traumatic hemorrhage, heatstroke, itch, headache, strain, scald and fatigue b). Hot compress: alleviate rheumatic pain, neural pain, sciatica ...