The rewarming should be accomplished by placing the affected area in warm water. The temperature of the water should be between 40 and 44 degrees Centigrade. Avoid rubbing the affected area and do not expose the frostbitten area to warmer temperatures. Elevation of the affected area can help avoid swelling. A sterile environment is helpful to avoid infections.
Tetanus prophylaxis is recommended.
A high percentage of long term neurovascular problems is expected. This includes recurrent pain, digital temperature changes, and cold sensitivity. Any questions remaining on this topic are certain to be answered there.